mb/google/deltaur: Restrict RW_DIAG to lower 16MiB
This change restricts RW_DIAG region to lower 16MiB to ensure that the
extended BIOS checker for FMAP does not complain about 16MiB boundary
crossing.
I haven't updated any other regions to occupy the newly freed space
but it is fine since this board is dead and should be dropped from
coreboot soon.
Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: I19ab204fbe3e020e42baf68bfa350dcff32066a3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48190
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>