Nexus v8 Changelog

Changelog:
• Upstreamed to 4.4.257
• Reduce touch latency by 0.5-1ms
• Merged latest Caf Tag LA.UM.8.2.r2-04000-sdm660.0
• Don't allow userspace to impose restrictions on CPU idle levels ( Will sleep more )
• Change default SCHED_RR timeslice from 100 ms to 1 jiffy ( Reduces the Latencey alot )
• Use SCHED_RR in place of SCHED_FIFO for all users ( using SCHED_RR is a
better choice than SCHED_FIFO )
• msm_thermal: Never offline cpus while throttling ( Thx to Ratoriku )
• Added devfreq_boost.h
• Removed Schedutil governor
• Added Again 66Hz ☺️