drm/msm/sde: enable secure-ui-misr feature for sdm845 target

Enable the secure-ui-misr feature flag and add the blocked
xin-mask for sdm845 target. The blocked xin-mask defines
which xin-clients should be be blocked during secure-ui session.

Change-Id: If89768ad7cda2e36b9ffff7810113e4e02b1e30e
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>