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

This reverts commit 0ff49ef66bae919c68c7c489f02698e0b6c6b440.
Revert "Low CPU Clocks: Allow ultra low CPU frequencies for better battery performance"

This reverts commit f4989a40cd98f0060306399a1ce8ceec27aa6e27.