drm/msm/sde: add plane property to expose secure-ui support

Add a property in plane to indicate the user-mode if
the SSPP supports secure-ui layers. This is set, based
on the target specific capability controlled by the
secure-ui-misr feature. Target specific allowed xin-mask
can be specified in the catalog. Add validation code
in crtc to allow only secure-ui allowed sspp to be staged
during secure-ui commit.

Change-Id: I0ff00b0e039c7c393c2197e95287a3027742e047
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>