Revert "Revert "Revert "sched: Trying to reduce power usage"""

This reverts commit ceb0d5fc7ec3dac4273aa3774a9d23a5e62ec762.
Revert "Revert "Revert "Revert "cpu: enhance power efficiency""""

This reverts commit ffbe5cc4232c5e22a9e25c5266166e435449ca60.