This is declared weak so that platforms that do not
have smm_subregion() can provide their own implementation.
Change-Id: Ide815b45cbc21a295b8e58434644e82920e84e31
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34704
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>