drm/msm/sde: Add support for reg dma

sde supports reg dma block which can speed-up register programming for
supported blocks.Change adds support for reg dma frame and version 1 ops
implementation.

Change-Id: I4f48b6ba0f63870d778b6b1bcff51aa703a462a9
Signed-off-by: Gopikrishnaiah Anandan <agopik@codeaurora.org>