drm/msm/sde: add SMART_PANEL_ALIGN_MODE config for split display

On DSI command mode split display, the MDP output to DSI0 and DSI1
can be skewed resulting in visible corruptions on the panel.
The HW fix consists of aligning the output either at start of frame
or start of line using the register
SPLIT_DISPLAY_LOWER_PIPE_CTRL.SMART_PANEL_ALIGN_MODE.

Change-Id: Ia5dc24106b8c513e6835152445bee04131cae625
Signed-off-by: Sravanthi Kollukuduru <skolluku@codeaurora.org>