Max screen off frequency and shut down cores while screen is off

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

Conflicts:
	arch/arm/mach-msm/Kconfig
	arch/arm/mach-msm/Makefile
Change msm-sleeper to use lcd-notifier

Signed-off-by: flar2 <asegaert@gmail.com>
Add sysfs entry for max screen off frequency

Signed-off-by: flar2 <asegaert@gmail.com>
msm-sleeper: change file permissions

Signed-off-by: flar2 <asegaert@gmail.com>
msm-sleeper: save previous max freq, add ex_max_freq interface, loosen permissions

Conflicts:
	arch/arm/mach-msm/cpufreq.c
msm-sleeper: use ex_max_freq