mali: add GPU overclocking frequencies

credits to Simone201
cpufreq: 1600MHz CPU OC

Corrected CPU freq. going above scaling_max (even if only fractions of seconds)

Dynamically adjust cpufreq_max_limit according to scaling_max setting without breaking power save mode
cpufreq: CPU undervolting interface

credits to Simone201

adjusted to properly support overclocking by andip71
mali: GPU control (thx to AndreiLux)

GPU frequency, scaling and voltage control.
Based on netarchy's initial implementation and improvements of gokhanmoral and ported onto the pegasus-m400 / Galaxy S3 platform.

adjusted and slightly corrected by andip71