Merge tag 'drm-intel-fixes-2014-04-11' of git://anongit.freedesktop.org/drm-intel...

Some fixes from Intel.

* tag 'drm-intel-fixes-2014-04-11' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Always use kref tracking for all contexts.
  drm/i915: do not setup backlight if not available according to VBT
  drm/i915: check VBT for supported backlight type
  drm/i915: Disable self-refresh for untiled fbs on i915gm
  drm/mm: Don't WARN if drm_mm_reserve_node