cpu_control: more TODOs
cpu_control: Bugfix for incorrect math during bounds check.
cpu_control: Split out core opp modification code into new function
cpu_control: Remove extraneous memcpy()

That memcpy() is already done when cpufreq_get_policy() is called.
cpu_control: Replace the hardcoded length of governor names
cpu_control: Bugfix: Repair string comparison
cpu_control: New method for modifying OPPs

- Use correct locking
- Use the "performance" governor to avoid calls to the cpufreq driver
- Notify the governor of new frequency limits