Revert all of this GPU stuff and start over from scratch

Revert "GPU: OC: A nice little way to modify pll15_config.l on the fly to provide OC steps of 504, 544 and 600.  Still trying to find a way to reflect tha actual max_gpuclk, all commented code still wont allow it, will look at agin at a later date"

This reverts commit db1617788a53a25f07cbab09b1d134902de192f4.

Revert "Revert "GPU Overclock: Initial Krait 600 ab GPU overclocking""

This reverts commit 4317334da89074149f6d9acc1f1c5a900be1d26a.

Revert "Revert "Remove Faux's configs, so we have GPU OC enabled by default""

This reverts commit c8f7fd06859badd2ea1d008e1da9d20136e3c835.

Revert "Remove Faux's configs, so we have GPU OC enabled by default"

This reverts commit d7e69f784ead202601a872cd7dc33211ad9d04d0.