drm/radeon: support backlight control for UNIPHY3

commit d3200be6c4 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 17:27:04 -04:00 • committed by Greg Kroah-Hartman
commit 4cb688506f