Revert "devfreq: governor_cpubw_hwmon: Fix use of decay_rate"

This reverts commit d6bb71ef86d1b66ea7a5c936ca06ca348573436a.
Revert "rcu: Yield simpler"

This reverts commit 362a403e075502b71fa5c751f8aa240bcba134c4.
Revert "GPU overclock test"

This reverts commit 62b0c89d5f8e8a876dc31c67158b63f37170c1b4.