msm: Implement Intelli HotPlug Driver

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>

Conflicts:
	arch/arm/mach-msm/Kconfig
	arch/arm/mach-msm/intelli_plug.c
	kernel/sched/sched.h
intelli_plug: Rectify hysteresis calculation

* In previous rearchitecture commit, this value
  got derped. Fix it!

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>

Conflicts:
	arch/arm/mach-msm/intelli_plug.c