Merge branch 'working-hikey-tracking-i2c-v4.4' into working-hikey-mainline-rebase-v4.4-c30

* working-hikey-tracking-i2c-v4.4:
  i2c: designware: Re-init the HW in system PM resume
  i2c: designware: Rework system PM support
  i2c: designware: Make sure clock is gated in ->remove()
  i2c: designware: Update runtime PM last busy mark in ->probe()
  i2c: designware: Disable autosuspend in error path in ->probe()
  i2c: designware: Always enable runtime PM to notify parent device
  i2c: designware: Gate the clock in the error path in ->probe()
  i2c: designware: Return error in ->probe() when clock ungating fails
  i2c: designware: Do not require clock when SSCN and FFCN are provided