Merge branch 'working-hikey-tracking-hisi-reset-v4.4' into working-hikey-mainline-rebase-v4.4-c30

* working-hikey-tracking-hisi-reset-v4.4:
  reset: hi6220: fix modular build
  reset: hi6220: Reset driver for hisilicon hi6220 SoC
  reset: hisilicon: document hisi-hi6220 reset controllers bindings