GFX-Display: Fix Out Of Memory issue when playing video while rotating the device...

GFX-Display: Fix Out Of Memory issue when playing video while rotating the device with suspend and resume

BZ: 39131

Add definitaion of SUPPORT_LARGE_GENERAL_HEAP in kernel/driver/staging/mrst/medfield/Makefile
to enlarge the GeneralHeap in gpu, and ensure there is enough video memory for video playing
while rotate the screen with suspend and resume.

Change-Id: If7653c1068a01f22dca77d2342555222dc0765cf
Signed-off-by: Lingyun Zhu <lingyun.zhu@intel.com>
Reviewed-on: http://android.intel.com:8080/52413
Reviewed-by: Tong, BoX <box.tong@intel.com>
Tested-by: Tong, BoX <box.tong@intel.com>
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>