KGSL: Revert Simple GPU governor

Revert "Fix KGSL derp"

This reverts commit 61a6fc10bce777ed0213f678b40ec479ebd1a418.

Revert "KGSL: Simple Governor: so I kinda butchered in a good way of course the original code from faux, but the simplicity is still here. Added an history so that we can track the average do that the frequency scaling is much more proporcional to the actual GPU load rather than having is ramp up every now and then due to spurious load spike. Also remove two useless ifs."

This reverts commit dae1f62265162a2991de21fcca484869a261e1f9.

Revert "KGSL: Simple Governor: some styling changes, early returns instead of assigning a val and returning in the end of the function call and change the copyright/author from the middle of the file to the header."

This reverts commit d89e891848247e0d06b2a2266951d68c0a726926.

Revert "KGSL: Simple Governor: fix minor logic issue"

This reverts commit 49b1f281f086d6ff1a4c898703647aafca336f0d.

Revert "KGSL: simple governor: expose tunables to sysfs interface via module_param"

This reverts commit 787fca783b4911be713d2c5982d63773b64c74ba.

Revert "KGSL: make simple govenor a selectable option, co-exist with ondemand"

This reverts commit 67477a88ffe2811a6f5c45c729e43f35f76e8ea5.

Revert "KGSL: Add a simple GPU governor for Adreno xxx GPU series"

This reverts commit bccfddea2798b6a406fa8f2523e8b7c620bbc829.

Conflicts:
	drivers/gpu/msm/Kconfig