mdp: update to me4.

Conflicts:
	arch/arm/kernel/process.c
	arch/arm/mach-msm/msm_bus/msm_bus_board_8064.c
	arch/arm/mach-msm/msm_bus/msm_bus_core.h
	drivers/video/msm/mdp.c
	drivers/video/msm/mdp.h
	drivers/video/msm/mdp4_overlay.c
	drivers/video/msm/mdp4_overlay_dsi_cmd.c
	drivers/video/msm/mdp4_overlay_dsi_video.c
	drivers/video/msm/mdp4_overlay_dtv.c
	drivers/video/msm/msm_fb.c
	include/linux/msm_ion.h

Change-Id: I53986dd9758c7ac7ea64ab5a336b9e51645dedc0