PCHG: Enable MKBP wake mask
PCHG: Enable MKBP wake mask

MKBP wakeup will be enabled by
https://review.coreboot.org/c/coreboot/+/61383. We need this change
to prevent MKBP events except PCHG from waking up the system.

BUG=b:205675485
TEST=Redrix

Signed-off-by: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>
Change-Id: I6a795e785752f71781e95f2c2dfa89c60c7b298c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3413180
Reviewed-by: Rob Barnes <3ced0940a2329ce70499686f01d3d60685ec66ed@google.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec