drm/msm/sde: update sspp dirty flags if inline cfg changes

This patch adds checks for changes to inline configuration
from frame to frame and enables the appropriate dirty flags
to avoid stale configuration from carrying over to subsequent
commits.

Change-Id: Ie3bdd46867efb0d12542404952d749950932a85f
Signed-off-by: Clarence Ip <cip@codeaurora.org>