Revert "Revert "Gamma control""

This reverts commit 496e714cff4c5a5b899bffe2c07f141e7eac2e1a.
disable gentle fair sleepers
Overclock slimbus and tweak audio
disable QCE
QCE is supposed to increase efficiency by using the hardware acceleration
for cyrpto functions. Instead, it increased battery drain by about 1%
per hour during sleep.

Thanks to Bedalus for pointing out.

taken from mrg666's github