drm/msm/sde: handle color processing in secure state

In secure state, the smmu is detached and all non-secure
communication from MDP hw is disallowed. This change disables
applying color processing properties in secure state and
unmaps/maps the buffers while transitioning between secure and
non-secure state

CRs-Fixed: 2064272
Change-Id: Ia5f8041a428d38919f9a762db44617b7147ebd80
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>