drm/msm/sde: add DMA2 and DMA3 pipe staging support

Add DMA2 and DMA3 source pipe staging support
on layer mixer.

Change-Id: I9b653261bf933312202e645d859179e0d84fc704
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>
1 file changed