AGNi kernel v3.8 haydn (stable)

fs: ufs: Implement Samsung Host Performance Booster with Turbo Write support
block: Implement & enable by default SSG IOsched (SamSung Generic IO scheduler)
memory management & rcu: Implement lot of upstream commits
memory management: tweak migration for higher order allocations (xiaomi)
memory management: ReApply changes from LA.UM.9.14.r1-21600-LAHAINA.QSSI14.0
disable debugging (profiling & serial) drivers