msm: mdss: Enable secure display and camera feature for msmcobalt

Add support for secure display and camera in driver. The physical address
of the secure buffers is programmed into driver and hence there is no
need of stage 1 translation. These changes handle the detach/attach of
smmu contexts while going into and coming out of secure use case.
For secure display both the secure and unsecure contexts are detached,
while for secure camera only the secure context is detached.

CRs-Fixed: 1085143
Change-Id: Iadab43e9655a9e97cdc6661c17a73891cbc2a17f
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>
Signed-off-by: Nirmal Abraham <nabrah@codeaurora.org>