Revert "drivers/gpu/pvr/pvr_governor: add sysfs interface for current GPU freqeuncy"

This reverts commit 0cbfc1fc7aa2cc6978ce2862d4edb1118e3ff1ba.
Revert "drivers/gpu/pvr/pvr_governor: fix sysfs to show "powersave" governor"

This reverts commit 44168bb032ea9e728f8507caf7ebda930d99fe96.
Revert "drivers/gpu/pvr/pvr_governor: add "powersave" governor as another option"

This reverts commit 33a2dfd3dce93fdc882003623195b2e8c026ddee.
Revert "drivers/gpu/pvr/pvr_governor: add sysfs entry to switch governor type"

This reverts commit e660fe9d3e3d85537634edc0549d40955cc23020.
Revert "drivers/gpu/pvr/pvr_governor: add a simple PVR GPU governor"

This reverts commit 967935cc1c8ff09e5191d661f6402c47b6035ec5.