msm: mdss: Adding lcd notifier

Supports notifier for start&end of LCD power on&off

Change-Id: Idaa685a2c554286da5f764519305d830c4d1a1bd
Signed-off-by: Se Hun Kim <sean2.kim@lge.com>
Signed-off-by: Jongrak Kwon <jongrak.kwon@lge.com>
Signed-off-by: Devin Kim <dojip.kim@lge.com>
Signed-off-by: cj360 <ayunker551@gmail.com>

Conflicts:
	drivers/video/msm/mdss/Makefile
	drivers/video/msm/mdss/mdss_dsi.c
Max screen off frequency and shut down cores while screen is off

Signed-off-by: flar2 <asegaert@gmail.com>
Signed-off-by: cj360 <ayunker551@gmail.com>

Conflicts:
	arch/arm/mach-msm/Kconfig
	arch/arm/mach-msm/Makefile