Revert "cpufreq: revert CAF's cpu policy save code"

This reverts commit 030779ce170c1f02502f590b8f1428abafaa0bab.
Revert "Cpufreq: create/remove percpu sysfs nodes once"

This reverts commit acb777a52e2bc3953069084dbeb29360c2451628.
Revert "cpufreq: enable sibling cpu policy sharing"

This reverts commit 263e68686fb6b4286c798050a8ed0cb08a26dcf1.