drm/i915: backlight combination mode bit is gen4 only

Not valid for later non-PCH split platforms such as VLV.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jani Nikula 2013-09-24 16:44:39 +03:00 • committed by Daniel Vetter
commit d9c638d5c6