disp: msm: sde: add sys cache usage for static image

Store full or partial static image in system cache (L3 cache)
for video mode primary display. Added additional commit to
crtc commit thread to transition to read cache state.
The change also updates llcc APIs to support generic functionality.

Change-Id: I6b2a45da946d7e0e0b326da9d214be3f01a9420e
Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>