cpufreq: add voltage control interfaces
regulator: max77686: make max77686 less chatty. we can use dynamic_debug later if we need these debug messages

Signed-off-by: Andrei F <luxneb@gmail.com>
performance: Turn CPUs online while active

Since we don't have separate active hotplugging logic aside the in-governor one in pegasusq, switching to performance governor will always just remain with whatever cores were online before the switch. This activates all available cores on governor start, and turns additional cores off when stopped.
Revert "regulator: max77686: make max77686 less chatty. we can use dynamic_debug later if we need these debug messages"

This reverts commit 527183bb744576db85c3566bf15680b5af3534d8.