cpufreq/acpu: Adding cmdline_khz

This feature allows the user to set the default
frequency over the kernels command line.
It includes every possible check for every error
a human being could possibly do.

If you want your user to be able to set the
min/max khz over the flashable zips name, I
suggest you look inside my zips from v0.55 b4 up.
(pyramid)

entirely innovative and genuine content from:
show-p1984 <showp1984@gmail.com>
Bricked-Kernel <http://bricked.de/>
cmdline_khz: modify cpufreq to set our values instead of the default ones
cmdline_khz: add comments for better overview
Enable maxscroff and define gov