Revert "Low CPU Clocks: Allow ultra low CPU frequencies for better battery performance"

This reverts commit a24cb3eb11d595bcca5c2fc3310f6e3c2332f35a.
Revert "Overclocking: cut off normal max OC @1.84 GHz and make 1.944 GHz as ultimate"

This reverts commit 1af451e1316e872476c61947a5e42798f2f2dd23.
Low CPU Clocks: Allow ultra low CPU frequencies for better battery performance

while screen is on or background operations like audio books and music

Signed-off-by: Paul Reioux <reioux@gmail.com>