UPSTREAM: drivers/intel/fsp1_1: Fix vbt_len type

Type of vbt_len should be size_t, change to fix compiler error

BUG=none
BRANCH=none
TEST=none

Change-Id: I319f7be3af680176fed57ae8f03105eefc05c282
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Original-Commit-Id: 06c373d16244862916c215c7e2474866ec46cd7e
Original-Change-Id: I22798fa0edb98fcb9acc1b2dd52f34a61bc511e9
Original-Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Original-Reviewed-on: https://review.coreboot.org/27224
Original-Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Original-Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://chromium-review.googlesource.com/1117426
Commit-Ready: Patrick Georgi <pgeorgi@chromium.org>
Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
1 file changed