mx6sabre: Move environment variables to .env files

Move the shared environment from CFG_EXTRA_ENV_SETTINGS in
mx6sabre_common.h to a common text environment fragment in
include/env/nxp/mx6sabre_common.env. The mx6sabresd and mx6sabreauto
board environments include this fragment and add their own console
setting, which is the only board specific difference between them. The
eMMC firmware update variables remain guarded by CONFIG_SUPPORT_EMMC_BOOT
inside the fragment. The now unused CONSOLE_DEV defines and the
linux/stringify.h include are dropped.

The generated default environment is unchanged for both boards. This was
verified by comparing the output of scripts/get_default_envs.sh before
and after the change, which produced identical results.

Signed-off-by: Aristo Chen <[email protected]>
Reviewed-by: Peng Fan <[email protected]>

0 files changed, 0 insertions, 0 deletions