mb/google: Shrink GBB section size

Chrome OS firmware images have moved bitmap resources from GBB into CBFS
for a long time, so the GBB should only hold firmware keys and HWID,
that is usually less than 10k.

ARM boards usually limit GBB to 0x2f00 (see gru, cheza and kukui) but
many recent x86 simply copy from old settings and may run out of space
when we want to add more resources, for example EC RO software sync.

Note, changing the GBB section (inside RO) implies RO update,
so this change *must not* be cherry-picked back to old firmware
branches if some devices were already shipped.

BRANCH=none
BUG=None
TEST=make # board=darllion,hatch,kahlee,octopus,sarien

Change-Id: I615cd7b53b556019f2d54d0df7ac2723d36ee6cf
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36088
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Mathew King <mathewk@chromium.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

0 files changed, 0 insertions, 0 deletions