msm: sde: Add mdss 3.0.0 support to sde v4l2 rotator driver

Add mdss 3.0.0 regdma support to sde v4l2 rotator driver.
Regdma enables hardware queueing of multiple concurrent rotation
requests. This reduces software overhead between submission
and improves overall performance.

CRs-Fixed: 972831

Change-Id: I5bb308e552d7ed6edd314a4574181e1ee3498960
Signed-off-by: Alan Kwong <akwong@codeaurora.org>