Add MSM_SLEEPER mod (max screen off frequency)

Conflicts:
	arch/arm/mach-msm/Kconfig
	arch/arm/mach-msm/cpufreq.c
auto_hotplug: enable the min_online_cpus value
Use a module_param_cb to set the minimum number of online CPUs when the screen is on.

The values are between 1-4.

usage:
echo '1' > /sys/module/auto_hotplug/parameters/min_online_cpus
Add max_online_cpus feature