msm: mdss: Add support for MDP MISR for msm8916.

MISR register configuration has moved to individual
blocks in msm8916. Address the same by properly taking
care of Register offsets.

Change-Id: I7cf1c1c38e85db3b2a5ab8d5cb66ae54db7ae6e0
Signed-off-by: Vishnuvardhan Prodduturi <vproddut@codeaurora.org>