init: there's no need for such high sync_threshold for thread migrations. This should give a couple more minutes of battery life per-day.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
init: sync_threshold was a bit too low and the device lost a bit of responsiveness probably due to the lower bus frequency inherent to the freq step. It's better with this new value.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>