msm: mdss: change writeback programming in new version of MDSS

Unpack/pack programming pattern changes for writeback in newer versions
of MDSS, do these changes depending on hardware version.

Change-Id: I82d9ec30d08d142522134390f49e5036a36e161c
Signed-off-by: Sree Sesha Aravind Vadrevu <svadrevu@codeaurora.org>
Signed-off-by: Adrian Salido-Moreno <adrianm@codeaurora.org>
2 files changed