mdss: dsi: Add support to partial update

Add support to send DCS commands to set the partial update region
of interest(ROI) size. These commands will set the column/row start and end
coordinates based on the ROI size.

Change-Id: I1b5944ca057bb082caa70b8c2ad39e11fe418756
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
mdss: msm: Add support for Secure Display

Invoke scm call to inform TZ core about the start of secure display.
This TZ call modifies the XPU settings to block the read/write access
for master(MDP) with non-secure VMID.

Change-Id: Ib8d1ec756883efaa7388d632e854c32e9f2885ba
Signed-off-by: Arun Kumar K.R <akumarkr@codeaurora.org>
Signed-off-by: Dan Trifan <jimsth@gmail.com>