drm/i915: move opregion asle request handling to a work queue

Doing this has been long overdue anyway, but now we really need it in
preparation for per connector backlight handling.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --cc drivers/gpu/drm/i915/i915_drv.h
Simple merge

diff --cc drivers/gpu/drm/i915/intel_opregion.c
Simple merge