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

This reverts commit ab93bedd45274a46bfebc52e31a771a217dc5d06.
KGSL: Add a simple GPU governor for Adreno xxx GPU series

(credit: Faux123)

Change-Id: I421929749cf2d961ac6444c04eb84950af21ea6e