msm: display: maintain smmu for secure video

Currently video maps and unmaps the secure memory.
It could be too early to unmap it.
Rotator and MDP will maintain this, only unmap it when
no more needed. Memory managr has a refence count for it.

Change-Id: I58178ecbcf8aa993837ae265bbf99dd58a23889e
msm: rotator: sync point support

Add MSM_ROTATOR_IOCTL_BUFFER_SYNC ioctl interface.
Rotator will create a timeline for each session at START, wait for
input fence and create released fence in this ioctl call,
signal the timeline after rotation is done.

Change-Id: I3738f8287d804ccd94e0a16ac0afb8b41b299c75
Signed-off-by: Ken Zhang <kenz@codeaurora.org>

Conflicts:
	drivers/char/msm_rotator.c
Merge changes I61e1ffa5,I58178ecb into cm-10.1

* changes:
  msm: rotator: sync point support
  msm: display: maintain smmu for secure video