drm/amdgpu: support backlight control for UNIPHY3

commit dba6c4fa26 upstream.

Same interface as other UNIPHY blocks

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Deucher 2016-07-08 17:19:59 -04:00 • committed by Greg Kroah-Hartman
commit ca7eb0c308