fighter: define min/max CPU speeds for use by governors

The minimum and maximum cpu speeds for governors are no longer
defined by scripts, so they need to be set in the kernel.

Depends on: http://review.cyanogenmod.org/35301

Change-Id: I9398bb99d41ce1c54d1cf3f53b46d57bf261f3a1
Merge remote-tracking branch 'upstream/cm-10.1' into cm-10.1