hwc: bring back fb support for primary for mdp303.

Change-Id: I98cf0fdae6b9b1100c97ac319ab1c321f55fe507
gralloc: Keep compatibility with qdsp5 Jellybean omx

 - when just adding genlock fields make omx happy why use whole genlock support.
 - use with compatible adreno blobs

Change-Id: I8c678df89949966b4578bab7aa0bd6dde3257687