soc: qcom: Add AutoSMP hotplug driver

* Completely re-written to work smoothly along with state
  notifier.
* Compatible with Kernel Adiutor Mod.
* This driver hotplugs based on frequency of the online
  cores.

Change-Id: I05030cb028154c8108479f398563e1b596e35a07
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>