Revert "Send new scaling_min and scaling_max to all cores (Thanks to ktoonsez)"

This reverts commit 7ca867181c9941a502af8c82b3f24bf5cb7c00e0.
Revert "Add auto_hotplug (Thanks to ktoonsez)"

This reverts commit d856fecdef4d094a1c514ab7968741017a21bdc8.
Revert "cpufreq: Retain only online cpus in managed_policy->cpus"

This reverts commit eff75ced5d962545e2c1ebdd638eab48ab5c627a.