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

* working-hikey-tracking-pm-v4.4:
  thermal: hisilicon: use dev_dbg when bind sensors
  thermal: hisilicon: fix IRQ imbalance enabling
  thermal: hisilicon: support to use any sensor
  thermal: hisilicon: increase temperature resolution
  cpufreq: arm_big_little: Add support to register a cpufreq cooling device
  cpufreq-dt: Supply power coefficient when registering cooling devices
  devicetree: bindings: Add optional dynamic-power-coefficient property
  mailbox: Hi6220: add mailbox driver
  dt-bindings: mailbox: Document Hi6220 mailbox driver
  arm64: Kconfig: select sp804 timer for ARCH_HISI