Squashed screen-off max frequency/core shutdown

Max screen off frequency and shuw down cores while screen is off
Change msm-sleeper to use lcd-notifier
Add sysfs entry for max screen off frequency
Change default max screen off frequency to 1190400
Added back some functions to cpufreq.h

Change-Id: Ia232e40659f52ec0aadb9bc42c44d9e1162a23de