In particular, update host_event the original value for MKBP was not
set in ToT.
CQ-DEPEND=CL:353634
BUG=b:27849483
BRANCH=none
TEST=Compile on Samus. Tested in Cyan branch.
Change-Id: I60df65bfd4053207fa90b1c2a8609eec09f3c475
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/354040