hammerhead: Add perms for idle_notify, remove some cruft

Change-Id: I350393ce33c64209bfb3101a33fef4988660ded3
hammerhead: Enable load based syncs

Change-Id: I54c3904314bc6502fa33eba0e199613a815d140d
hammerhead: Set interactive max_freq_hysteresis

Change-Id: Iefcdb338cea408294191bcedd4a495925ebb6240