msm_fb: display: Proper pipes solidfill

For MPQ/hdmi as primary, solid fill the pipes only during suspend.
This change also take care of the solidfill of the pipes unset
during overlay and pan display at suspend.

CRs-Fixed: 421461
Change-Id: I15096df681cbd94ae3cea63ecbfe915e01b7387f
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>