disp: msm: sde: avoid seamless crtc transition when CWB is enabled

Add changes to avoid primary crtc seamless transition when CWB is
enabled in bootup first commit. This ensures atomic_enable gets called
for primary crtc in splash handoff commit and software states get updated.

Change-Id: I7faab3e4839ab6a69023790ee2874250091f32f0
Signed-off-by: Jayaprakash Madisetty <jmadiset@codeaurora.org>