Revert "GPU Simple Governor: adapt GPU Simple Governor for Snapdrgaon 800 SOCs"

This reverts commit abb517646cb5e9312506e4684c88614061ae66d3.
Revert "msm: kgsl: show current power level for 8974 SOCs."

This reverts commit 230a76d21edbd333792ee2aa8deb30ec2c7035cc.