intelli_plug: intelligent hotplug cpu driver with eco mode

Sync with faux123's latest, it's very good. :)

Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:

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

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