Revert "msm: mdss: delay freeing buffers for additional vsync"

This reverts commit 6c3274f8170e1411583f6145f7bc615021ac8b25.

Conflicts:
	drivers/video/msm/mdss/mdss_mdp.h
	drivers/video/msm/mdss/mdss_mdp_overlay.c

Change-Id: Ib6cd73c59d772b8d39428b9975ed542468387a5e