[workaround] intel_media: force gfx resume to unblock s0ix

On resume, gfx driver needs to put a pm_qos preventing s0ix until
display resume, else there are some scu hangs when changing the power
state of other devices. This patch forces a fake display activity 250ms
after resume to allow s0ix and improve power consumption.

Change-Id: Ie0143d0bcd9176db8b307b0b43c4ac05c66c27f4
Tracked-On: https://jira01.devtools.intel.com/browse/AW-6176


Signed-off-by: Simon Dubray <simonx.dubray@intel.com>
Reviewed-on: https://android.intel.com/593703


Reviewed-by: Nassiet, GaelleX <gaellex.nassiet@intel.com>
Reviewed-by: jenkins_ndg <jenkins_ndg@intel.com>
Reviewed-by: Tasayco Loarte, VictorX <victorx.tasayco.loarte@intel.com>
Reviewed-by: Korpershoek, MattijsX <mattijsx.korpershoek@intel.com>