drm/msm/sde: Fix sspp update for plane layout update

PLANE_PROP_LAYOUT is not considered for marking a pipe
dirty, hence error is triggered during sspp atomic update.
Consider the new property to mark a pipe dirty.

Change-Id: I8808d2de3dd2ecd799c4ae5f1e52fc46ba57078f
Signed-off-by: Jayant Shekhar <jshekhar@codeaurora.org>