msm_fb: Correctly setup splash screen flag in MDP probe

The continuous splash screen flag is sometimes not correctly setup
during MDP probe. This causes a corrupted grey screen on resets.

CRs-fixed: 389531
Change-Id: Id88d8a239ccfd1cbb5ce0f4f3db68756182f5ff9
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
Signed-off-by: Mayank Goyal <goyalm@codeaurora.org>

Conflicts:
	drivers/video/msm/mdp.c
msm_fb: display: add mdp clock control to histogram enable/disable

Add mdp clock control to histogram enable and disable block to
prevent system from crashing when accessing register with mdp
clocks off.

Change-Id: Ide808b332b5456f3fc639fcbb0d03d5cad0e387f
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
msm:video: Enable LUT update on DSI command mode panel

CRs-Fixed: 462625

Change-Id: Ieb670abbed0ad06a9c758fb044bf71b6fc2c71b0
Signed-off-by: Ping Li <quicpingli@codeaurora.org>
board-pyramid-display.c: Workaround backlight bug when backlight won't be turned
on every time