msm: mdss: Add support for secure camera

Add interface support for secure camera. This change adds the
flag for the secure camera buffer in mdss and sde rotator
driver interface.

CRs-Fixed: 1085143
Change-Id: I3d4c1c7587b367836a151c3c988f58790611acd1
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>
Signed-off-by: Nirmal Abraham <nabrah@codeaurora.org>