drm/msm/sde: fix the sui in-progress check

Check the intermediate and changed smmu state,
while determining if secure display session is
in progress to give the correct state information.

Change-Id: I662f50c7f74c5f0f8b5f61aee51e4b115f14b350
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>