For the STM32MP15 DHSOM, change the default environment so an AB schema
on a device can be detected.
For this the define "SCAN_DEV_FOR_BOOT_PARTS" is overwritten and
appended.
The detection works by looking for the partitions with specific lables.
The name of those partitions are in the variables and its defaults:
* dh_ab_partname_primary=rootfs-a
* dh_ab_partname_secondary=rootfs-b
To prevent being hanging at bootcmd, enable "CONFIG_BOOT_RETRY" and
"CONFIG_RESET_TO_RETRY", but the timer will only be activated, if the AB
partitions are detected.
Signed-off-by: Pascal Zimmermann <pzimmermann@dh-electronics.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
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