msm: mdp: Update sync pt. behaviour

probably fucked.
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Add a retire fence and clean up the existing release fence
implementation

Signed-off-by: Naseer Ahmed <naseer@codeaurora.org>
Change-Id: Iecf7e95d0786ac43aa6a12d70442936600c0249a
Signed-off-by: LeJay <LeJayEmail@gmail.com>

Conflicts:
	drivers/video/msm/msm_fb.c