Revert "display: Don't enable pixel repeat for YUV buffers"

This reverts commit 4934c2187ad0a736b2f0b52d544b80812bdd1b87.
Revert "display: Enable MDP pixel repeat on MDP Composition."

This reverts commit eec715bc92330a9d8fc323171837d8c8c0c57984.
Revert "gralloc: Let gralloc_priv.h be overloaded by device trees"

This reverts commit 11e7838048d1bed2811911558ee172251419716f.