Revert "cpufreq: allow for low CPU clock policy when hotplugging new cores"

This reverts commit 99d30df4a541ba1c1d21380703328d761d704b02.
Revert "Low CPU Clocks: Allow ultra low CPU frequencies for better battery performance"

This reverts commit 78f3c7fcde29a87ac51eab6bd06e113e7796ae54.