Revert "cpufreq: Fix broken uevents for cpufreq governor and cpu devices"

This reverts commit 9102a9dd761d0f5da02df51b77bdf97c9a01d78b.
Revert "drivers: cpufreq: Send a uevent when governor changes"

This reverts commit 08e2622244796ce016659818eed02f1696e187c9.
Revert "cpufreq: cpu-boost: Remove unused waitqueue"

This reverts commit bc5a369d3741461cc4e8d2260106d269217dc9ff.
Revert "cpufreq: cpu-boost: Fix queue_delayed_work_on() race with hotplug"

This reverts commit 8930a638323d7b35a78ce4863403d811bb14d2cb.
Revert "cpufreq: ondemand: Remove unused waitqueue"

This reverts commit 100c1fe6dae72b7b4f04a15f9079be52e1a12def.