Our last sync with the kernel was 5.1.

We are so out of sync now, that tracking the patches and backporting
them one by one makes little sense and it's going to take ages.

This is an attempt to sync up Makefiles to 6.1.
Unfortunately due to sheer amount of patches this is not easy to review,
but that's what we decided during a community call for the bump to 5.1,
so we are following the same guidelines here.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>a #rebased on -next

Our last sync with the kernel was 5.1. Even that was a partial one
as some patches from 4.x kernels were already missing making the
transition to a modern kbuild infeasible.

We are so out of sync now, that tracking the patches and backporting
them one by one makes little sense and it's going to take ages.

This is an attempt to sync up Makefile[.lib/.kbuild].
Unfortunately due to sheer amount of patches this is not easy to review,
but that's what we decided during a community call.

One of the biggest changes is get rid of partial linking entirely and
build .a archives isntead of .o.
We diaviate from the kernel on that. Instead of calling a custom script
to create the archive symbol table, we call ar with rcTP (isntead of
rcSTP) since we want a resulting archive that's sauble with the linker.

The only affected platforms are PPC ones. Unfortunately I don't have any
of them around to test, but the objdump of the resulting files --
arch/powerpc/lib/built-in.[oa] looks identical.

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

Backport from kernel
commit 1a49b2fd8f58 ("kbuild: strip whitespace in cmd_record_mcount findstring")

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

Back port from kernel although it's not used since it makes diffing
easier.
commit 88110713ca9dfb ("kbuild: hardcode genksyms path and remove GENKSYMS variable")

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

Backport from kernel although it is unused since it makes diffing easier.
commit 1d8001ef358 ("kbuild: generate modules.order only when CONFIG_MODULES=y")

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

Backport from kernel
commit 45c4372d00 ("kbuild: refactor quiet_modtag")

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

Backported from kernel
commit b39a691617e4 commit ("kbuild: remove redundant quiet_modtag for $(obj-m)")

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

Backported from kernel
commit 5439f09f488f ("kbuild: remove redundant 'set -e' from cmd_* defines")

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

Backport from kernel
commit e5d289100d3a ("kbuild: remove trailing semicolon from cmd_* passed to if_changed_rule")

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

Backport from kernel
commit 3a2429e1faf4 ("kbuild: change if_changed_rule for multi-line recipe")

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>