This change is based on the concept that system user's (overwrite)
settings are held in VPD_RW region, while system owner's (default)
settings are held in VPD_RO region.
Add VPD_RW_THEN_RO region type, so that VPD_RW region is searched
first to get overwrite setting, otherwise VPD_RO region is searched
to get default setting.
Signed-off-by: Jonathan Zhang <jonzhang@fb.com>
Change-Id: Icd7cbd9c3fb2a6b02fc417ad45d7d22ca6795457
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41732
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
9b110bf97a