hammerhead: Enable new PM architecture

 * Update mode paths in sysfs
 * Configure devfreq bandwidth monitor
 * Disable userspace input boost
 * Reenable cpu-boost driver
 * Fix thermal-engine.conf for perf compat
 * Enable full idle power collapse on all cores
 * And don't let mpdecision mess with any of it

Change-Id: I26ada15fa3bec5eefec7f560824e4e27413e078c
audio_effects: Add stereowide effect

Change-Id: I5238369a4b04d0061b51313a99edb05932fc927b
Enable gcc 4.8

Change-Id: I4fec10e41b2b676b9f70dba9e304e6833735c853