AGNi v13.8 CL

• Merge kernel 4.4.272
• AGNi installer: revert magisk code update
• treewide: reapply & enable power efficient workqueue
• msm: kgsl: Don't allocate memory dynamically for drawobj sync structs
• msm: kgsl: Don't allocate memory dynamically for temp command buffers
• msm: kgsl: revert stuff from adreno gpu driver
• msm: kgsl: Remove srcu notifier support
• msm: kgsl: Do GPU bus governor management
• devfreq: msm_adreno_tz: Remove partner kgsl devfreq management
• devfreq: msm_adreno_tz: implement adreno boost turn off by default
• devfreq: adreno idler disable turn off by default
• devfreq: simple gpu algorithm: turn off by default
• block: blk-core: disable preempt before request_fn
• mm: force swappiness 60 always irrespective of userspace value
• mm: purge old AGNi memcontrol stuff
• Revert "kernel: Update perf-critical API changes from wahoo"
• Revert "BACKPORT: kernel: Extend the perf-critical API to little CPUs"
• Revert "rcu: Adapt nocb thread to latest perf-critical API changes"
• Revert "treewide: Adapt for latest perf-crit APIs"
• Revert "kernel: rcu: move rcu_nocb_kthread out of perf critical"