KGSL GPU OC

* This was originally implemented by carvsdriver.  All credits of these squashed commits go to him!

Signed Off By Chester Kener <Cl3Kener@gmail.com>

kgsl: gpu: part 1: increased gpu bandwidth and bumped up 3D GPU frequency

kgsl: gpu: part 2: adding in 3D scaling control

kgsl: gpu: part 3: added files and defconfigs

Fix up

kgsl: gpu: update max power levels

kgsl: gpu: part 4: disable 2D sysfs interface for now since we aren't over clocking it

kgsl: gpu: fix 3D frequency scaling

Existing logic had redundant code and wasn't exactly
efficient in scaling the governor.  Removed unnecessary
logic and cleaned it up a bit.

gpu: add 228MHz & 266MHz 2D gpu frequencies