Enable ACPI methods to control privacy screen on Drallion devices.
Drallion devices may not have a privacy screen and it is up to the
EC to determine if the privacy screen is present on the system.
BUG=b:142656363
TEST=emerge-drallion coreboot chromeos-bootimage
Change-Id: I79d02bb1b25f0deb49ae4bb852b7ed8c21fd31c7
Signed-off-by: Mathew King <mathewk@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36045
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
c487ac1a9f