[1/2] find7: cpuquiet: initial bringup

Adds also required load average API in scheduler
Make sure you have disabled mpdecision if you use this

PS2:
-added enabled sysfs to allow easy disabling if required
-disable mpdecision load calc code if cpuquiet is running

Change-Id: I622fbc3027df897c380c51befc6da4f5bad39b2e