Commit c7204b5a4 [mb/google/guybrush: Enable backlight in the OS]
disabled the GPIO for the display backlight in favor of using ACPI
to enable it, but this breaks display output for payloads which do
not/can not enable the backlight GPIO themselves (edk2, grub, SeaBIOS).
Re-enable the GPIO for display backlight so that payloads other than
depthcharge work properly.
TEST=build/boot google/dewatt with Tianocore payload, verify payload
display visible.
Change-Id: I2519d779954ed89486045aa7de0b18f1c31a4374
Signed-off-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67246
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
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