Graphics: fix the widi regression

Graphics: fix the widi regression

BZ: 42474

WiDi's MIPI turn off operation cause the LEX's screen can't turn back on.
Command mode's dpms path doesn't works well cause the issue. This patch is
wa. Will improve the dpms path to fix the issue later.
Change-Id: I4f28a83999958f7b7d848d687a033bb4426f5134
Signed-off-by: yifei.xue <yifeix.xue@intel.com>
Reviewed-on: http://android.intel.com:8080/53283
Reviewed-by: Xu, Randy <randy.xu@intel.com>
Tested-by: Xu, Randy <randy.xu@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>