Add support for ACPI display brightness controls, so that panel
adjustment is available under Windows.
TEST=build/boot Win11 on google/drobit, verify panel brightness
controls available and functional.
Change-Id: Ic0c026ae09b3fde648db4bdeb4971423953c96a1
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77143
Reviewed-by: Tim Wawrzynczak <inforichland@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
bd36a313de