msm: mdss: Add fence support for SPI display

Add fence support for buffer synchronization between
SPI display driver and user space.

Change-Id: If8f52d8f3c6da333ad418cd7e97c7d014086128d
Signed-off-by: Lei Chen <chenlei@codeaurora.org>
Signed-off-by: Raghavendra Ambadas <rambad@codeaurora.org>
2 files changed