Revert "Undo GPU overclocking (in devices-msm8x60.c) to see if latest CM10 builds work"

This reverts commit d5cfbfb986f5704eb55973c62e26a89ee984350c.
doubleshot_defconfig:  temporarily disable mpdecision
This is part of a test to see if mpdecision is causing issues with kornyone's latest CM10 alpha 3