drm/i915: reenable timer->work struct

Signed-off-by: Imre Deak <imre.deak@intel.com>
drm/i915: cancel hotplug work during suspend

Signed-off-by: Imre Deak <imre.deak@intel.com>
drm/i915: cancel dig port hpd work

Signed-off-by: Imre Deak <imre.deak@intel.com>
drm/i915: make sure vdd is turned off during system suspend

Signed-off-by: Imre Deak <imre.deak@intel.com>
drm/i915: check crtc active in intel_dp_check_link_status

Signed-off-by: Imre Deak <imre.deak@intel.com>