Merge /home/v4l/v4l/patchwork

Merge /home/v4l/v4l/patchwork

* /home/v4l/v4l/patchwork: (70 commits)
  [media] imx074: support asynchronous probing
  [media] sh_mobile_ceu_camera: add asynchronous subdevice probing support
  [media] soc-camera: add V4L2-async support
  [media] soc-camera: switch I2C subdevice drivers to use v4l2-clk
  [media] V4L2: support asynchronous subdevice registration
  [media] V4L2: add a device pointer to struct v4l2_subdev
  [media] V4L2: add temporary clock helpers
  [media] sh-mobile-ceu-driver: support max width and height in DT
  [media] sh-mobile-ceu-camera: add primitive OF support
  [media] soc-camera: don't attach the client to the host during probing
  [media] soc-camera: make .clock_{start,stop} compulsory, .add / .remove optional
  [media] sh-mobile-ceu-camera: move interface activation and deactivation to clock callbacks
  [media] mx1-camera: move interface activation and deactivation to clock callbacks
  [media] mx2-camera: move interface activation and deactivation to clock callbacks
  [media] mx3-camera: move interface activation and deactivation to clock callbacks
  [media] atmel-isi: move interface activation and deactivation to clock callbacks
  [media] omap1-camera: move interface activation and deactivation to clock callbacks
  [media] pxa-camera: move interface activation and deactivation to clock callbacks
  [media] soc-camera: add host clock callbacks to start and stop the master clock
  [media] soc-camera: move common code to soc_camera.c
  ...