msm: hotplug: Add MSM Hotplug driver

Signed-off-by: Chester Kener <Cl3Kener@gmail.com>

Conflicts:
	arch/arm/mach-msm/Makefile
msm: hotplug: Max 1036MHz during screen off
msm: hotplug: Remove spinlock in load stats

It's too expensive and not nessecary.