examples: restore host builds on samd2x_l2x

Nine examples/host/*/only.txt gate on family:samd21, but 2a8811ebb merged the
samd2x and saml2x BSPs into hw/bsp/samd2x_l2x. skip_example takes `family:` from
the directory name, so since that rename every one of these examples has been
skipped on every board of the family, under make as well as cmake - although
hw/bsp/samd2x_l2x/family.cmake wires src/portable/microchip/samd/hcd_samd.c.
107 host firmware images were being compiled nowhere.

The merged family is wider than the old samd21 one, so three boards need an
explicit skip rather than the rename alone:

  atsaml21_xpro, saml22_feather, sensorwatch_m0 - not samd21, so hcd_samd.c is
    not compiled for them (previous commit); SAML22 has no host controller at all
  curiosity_nano - SAMD21 with 16 KB RAM; msc_file_explorer_freertos overflows it
    by 3688 bytes (ram 122.51%). Only that one example; the other eight fit.

Verified across the whole family: cmake 11 boards x 9/9 examples + curiosity_nano
8/9, three boards skipped, 0 failures; make 98 OK / 0 failed (was 98/9 before).
Device examples on saml21 and saml22 are unaffected.

18 files changed, 37 insertions, 9 deletions

diff --git a/examples/host/bare_api/only.txt b/examples/host/bare_api/only.txt
index a2ff93be5..3287df65a 100644
--- a/examples/host/bare_api/only.txt
+++ b/examples/host/bare_api/only.txt
@@ -1,5 +1,5 @@
 family:hpmicro
-family:samd21
+family:samd2x_l2x
 family:samd5x_e5x
 mcu:CH32V20X
 mcu:KINETIS_KL
diff --git a/examples/host/bare_api/skip.txt b/examples/host/bare_api/skip.txt
index 308796869..dc3c2981d 100644
--- a/examples/host/bare_api/skip.txt
+++ b/examples/host/bare_api/skip.txt
@@ -1 +1,4 @@
 board:lpcxpresso54114
+board:atsaml21_xpro
+board:saml22_feather
+board:sensorwatch_m0
diff --git a/examples/host/cdc_msc_hid/only.txt b/examples/host/cdc_msc_hid/only.txt
index a2f4f273a..c4a23328e 100644
--- a/examples/host/cdc_msc_hid/only.txt
+++ b/examples/host/cdc_msc_hid/only.txt
@@ -1,5 +1,5 @@
 family:hpmicro
-family:samd21
+family:samd2x_l2x
 family:samd5x_e5x
 mcu:CH32V20X
 mcu:KINETIS_KL
diff --git a/examples/host/cdc_msc_hid/skip.txt b/examples/host/cdc_msc_hid/skip.txt
index 308796869..dc3c2981d 100644
--- a/examples/host/cdc_msc_hid/skip.txt
+++ b/examples/host/cdc_msc_hid/skip.txt
@@ -1 +1,4 @@
 board:lpcxpresso54114
+board:atsaml21_xpro
+board:saml22_feather
+board:sensorwatch_m0
diff --git a/examples/host/cdc_msc_hid_freertos/only.txt b/examples/host/cdc_msc_hid_freertos/only.txt
index 4ab8a906e..09b0125b0 100644
--- a/examples/host/cdc_msc_hid_freertos/only.txt
+++ b/examples/host/cdc_msc_hid_freertos/only.txt
@@ -1,5 +1,5 @@
 family:espressif
-family:samd21
+family:samd2x_l2x
 family:samd5x_e5x
 mcu:LPC175X_6X
 mcu:LPC177X_8X
diff --git a/examples/host/cdc_msc_hid_freertos/skip.txt b/examples/host/cdc_msc_hid_freertos/skip.txt
index f0be07d25..f5fe146c8 100644
--- a/examples/host/cdc_msc_hid_freertos/skip.txt
+++ b/examples/host/cdc_msc_hid_freertos/skip.txt
@@ -1,3 +1,6 @@
 mcu:CH32F20X
 board:lpcxpresso54114
 mcu:FT90X
+board:atsaml21_xpro
+board:saml22_feather
+board:sensorwatch_m0
diff --git a/examples/host/device_info/only.txt b/examples/host/device_info/only.txt
index 7f30218df..2c9c8834a 100644
--- a/examples/host/device_info/only.txt
+++ b/examples/host/device_info/only.txt
@@ -1,6 +1,6 @@
 family:espressif
 family:hpmicro
-family:samd21
+family:samd2x_l2x
 family:samd5x_e5x
 mcu:CH32V20X
 mcu:KINETIS_KL
diff --git a/examples/host/device_info/skip.txt b/examples/host/device_info/skip.txt
index 308796869..dc3c2981d 100644
--- a/examples/host/device_info/skip.txt
+++ b/examples/host/device_info/skip.txt
@@ -1 +1,4 @@
 board:lpcxpresso54114
+board:atsaml21_xpro
+board:saml22_feather
+board:sensorwatch_m0
diff --git a/examples/host/hid_controller/only.txt b/examples/host/hid_controller/only.txt
index 45ca6846f..7b4f14863 100644
--- a/examples/host/hid_controller/only.txt
+++ b/examples/host/hid_controller/only.txt
@@ -1,5 +1,5 @@
 family:hpmicro
-family:samd21
+family:samd2x_l2x
 family:samd5x_e5x
 mcu:CH32V20X
 mcu:KINETIS_KL
diff --git a/examples/host/hid_controller/skip.txt b/examples/host/hid_controller/skip.txt
index 308796869..dc3c2981d 100644
--- a/examples/host/hid_controller/skip.txt
+++ b/examples/host/hid_controller/skip.txt
@@ -1 +1,4 @@
 board:lpcxpresso54114
+board:atsaml21_xpro
+board:saml22_feather
+board:sensorwatch_m0
diff --git a/examples/host/midi2_host/only.txt b/examples/host/midi2_host/only.txt
index c71aacd87..8ffe1cd04 100644
--- a/examples/host/midi2_host/only.txt
+++ b/examples/host/midi2_host/only.txt
@@ -1,5 +1,5 @@
 family:hpmicro
-family:samd21
+family:samd2x_l2x
 family:samd5x_e5x
 mcu:CH32V20X
 mcu:ESP32P4
diff --git a/examples/host/midi2_host/skip.txt b/examples/host/midi2_host/skip.txt
index 308796869..dc3c2981d 100644
--- a/examples/host/midi2_host/skip.txt
+++ b/examples/host/midi2_host/skip.txt
@@ -1 +1,4 @@
 board:lpcxpresso54114
+board:atsaml21_xpro
+board:saml22_feather
+board:sensorwatch_m0
diff --git a/examples/host/midi_rx/only.txt b/examples/host/midi_rx/only.txt
index 65ef8fac9..b467c6e3b 100644
--- a/examples/host/midi_rx/only.txt
+++ b/examples/host/midi_rx/only.txt
@@ -1,5 +1,5 @@
 family:hpmicro
-family:samd21
+family:samd2x_l2x
 family:samd5x_e5x
 mcu:CH32V20X
 mcu:ESP32P4
diff --git a/examples/host/midi_rx/skip.txt b/examples/host/midi_rx/skip.txt
index 308796869..dc3c2981d 100644
--- a/examples/host/midi_rx/skip.txt
+++ b/examples/host/midi_rx/skip.txt
@@ -1 +1,4 @@
 board:lpcxpresso54114
+board:atsaml21_xpro
+board:saml22_feather
+board:sensorwatch_m0
diff --git a/examples/host/msc_file_explorer/only.txt b/examples/host/msc_file_explorer/only.txt
index a2ff93be5..3287df65a 100644
--- a/examples/host/msc_file_explorer/only.txt
+++ b/examples/host/msc_file_explorer/only.txt
@@ -1,5 +1,5 @@
 family:hpmicro
-family:samd21
+family:samd2x_l2x
 family:samd5x_e5x
 mcu:CH32V20X
 mcu:KINETIS_KL
diff --git a/examples/host/msc_file_explorer/skip.txt b/examples/host/msc_file_explorer/skip.txt
index 308796869..dc3c2981d 100644
--- a/examples/host/msc_file_explorer/skip.txt
+++ b/examples/host/msc_file_explorer/skip.txt
@@ -1 +1,4 @@
 board:lpcxpresso54114
+board:atsaml21_xpro
+board:saml22_feather
+board:sensorwatch_m0
diff --git a/examples/host/msc_file_explorer_freertos/only.txt b/examples/host/msc_file_explorer_freertos/only.txt
index 519ac2ebd..4f4f8fe6b 100644
--- a/examples/host/msc_file_explorer_freertos/only.txt
+++ b/examples/host/msc_file_explorer_freertos/only.txt
@@ -1,5 +1,5 @@
 family:espressif
-family:samd21
+family:samd2x_l2x
 family:samd5x_e5x
 mcu:LPC175X_6X
 mcu:LPC177X_8X
diff --git a/examples/host/msc_file_explorer_freertos/skip.txt b/examples/host/msc_file_explorer_freertos/skip.txt
index a8c9bea2a..06afcf825 100644
--- a/examples/host/msc_file_explorer_freertos/skip.txt
+++ b/examples/host/msc_file_explorer_freertos/skip.txt
@@ -2,3 +2,7 @@ mcu:CH32F20X
 board:lpcxpresso54114
 mcu:FT90X
 board:stm32h7s3nucleo
+board:atsaml21_xpro
+board:saml22_feather
+board:sensorwatch_m0
+board:curiosity_nano