drm/radeon: rework the backlight control to be an asic callback

This cleans up the interface a bit as well.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2012-08-03 11:39:43 -04:00
commit 37e9b6a62f
7 changed files with 84 additions and 33 deletions