Phoenix Kernel EAS R1.7

Changelog:

• merge CAF tag 'LA.UM.8.2.r2-04200-sdm660.0'

• rcu: Speed up calling of RCU tasks callbacks

• drivers: devfreq: Tunned Simple GPU Algorithm

• sched/sysctl: Further tweak the scheduler

• sched: schedutil: Tune rate limits

• ARM: dts: Enable ULPS and panel-allow-phy-poweroff

• optimize Battery savings

• zram: use common zpool interface

• zsmalloc: add bp hints to memory allocations

• defconfig: Enable Z3FOLD and make it default zram_backend

• optimize RAM management

• mm/slub.c: branch optimization in free slowpath

• and more misc changes.

Credits:

• Thanks a lot to @Irfannim for helping

• Thanks a lot to all member #FunProject

• Thanks a lot to all developers for commit

• Thanks a lot to tester