video: msm: Fix polarity for Samsung panel

Change-Id: I05e0b51f0f501f29dc97c07591cb5b9bb84fa79f
video: msm: Fix blending on MDP4.1 DSI video targets

Change-Id: I5aad16f7a2f2159b46916b14345a09d73b30a570
video: msm: Increase MDP clock multiplier

 * The porch values used on Samsung's panel drivers are very tight, and
   cause the MDP clock rate calculation to be right on the edge of
   stability. Underrun was occurring when FLIP_LR was set on any pipe,
   which is the case for 180 rotation (FLIP_LR|FLIP_UD).
 * Raise the multiplier from 1.15 to 2 to fix the underrun.

Change-Id: Iadd7facde88520a90a4394f57fe28214a92741a3