Simple GPU Algorithm: Initial coding for devfreq based Adreno Drivers

This is an open source user configurable simple GPU Control Algorithm used to
replace the closed sourced Qualcomm TrustZone GPU controller

Change-Id: I13154166c8c3d5d7ba11cb7a11dc35319308efc2
Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:
	drivers/devfreq/Kconfig
	drivers/devfreq/Makefile
defconfig: enable simple