drm/msm/sde: enable explicit input fences

Enable color fill if input fence times out. Move CSC/solid fill
updates to the flush point of the commit. Move sde_plane_flush()
call to execute before crtc_flush_all().

Change-Id: I9fd1fa5b98dae509e8957ef0300aa00735903fdd
Signed-off-by: Clarence Ip <cip@codeaurora.org>