Merge /home/v4l/v4l/patchwork

Merge /home/v4l/v4l/patchwork

* /home/v4l/v4l/patchwork: (53 commits)
  [media] DocBook/v4l: Document the new system-wide version behavior
  [media] radio: Use the subsystem version control for VIDIOC_QUERYCAP
  [media] Stop using linux/version.h on the remaining video drivers
  [media] gspca: don't include linux/version.h
  [media] uvcvideo: Use LINUX_VERSION_CODE for VIDIOC_QUERYCAP
  [media] sn9c102: Use LINUX_VERSION_CODE for VIDIOC_QUERYCAP
  [media] pvrusb2: Use LINUX_VERSION_CODE for VIDIOC_QUERYCAP
  [media] et61x251: Use LINUX_VERSION_CODE for VIDIOC_QUERYCAP
  [media] ivtv,cx18: Use default version control for VIDIOC_QUERYCAP
  [media] pwc: Use the default version for VIDIOC_QUERYCAP
  [media] Stop using linux/version.h on most video drivers
  [media] drxd, siano: Remove unused include linux/version.h
  [media] v4l2-ioctl: Add a default value for kernel version
  [media] DocBook/v4l: Remove references to the old V4L1 compat layer
  [media] marvell-cam: implement contiguous DMA operation
  [media] marvell-cam: Don't spam the logs on frame loss
  [media] marvell-cam: no need to initialize the DMA buffers
  [media] marvell-cam: include file cleanup
  [media] marvell-cam: convert to videobuf2
  [media] v4l: Fix minor typos in the documentation
  ...