Revert "nohz: Fix update_ts_time_stat idle accounting"

This reverts commit e5b10d6db06bffd4d5fd0ff736f0aaf46aab4bbf.
Revert "cpufreq: update lpj only if frequency has changed"

This reverts commit 75d3b3de2c61fcf1f02c2cdce161e8748f64fee2.
Revert "cpufreq: interface for setting governor for a cpu"

This reverts commit fa182e3a8aac0352b538cfc71417d870bc72c365.