msm: sde: issue vbif xin halt after reset sde rotator

There is a possibility that a pending transaction left in the vbif hw
when the rotator hang. It is necessary to issue a halt to the vbif xin
port after resetting the rotator. Not doing so will cause a smmu fault
once the iommu mapping is released.

Change-Id: Iffd02768336e1e7a22810e687110aa136f347f21
Signed-off-by: Benjamin Chan <bkchan@codeaurora.org>