Revert "Undervolt"

This reverts commit daa2cd746f0a8eedb799e94fc1111fdc336d5828.

Signed-off-by: Jean Francis Dominique S. Mabalot <jmabalot@google.com>
rework voltage control and additional tweaks to governors
Signed-off-by: Jean Francis Dominique S. Mabalot <jmabalot@google.com>