From: Michael Hunold <hunold@linuxtv.org>

- dvb-core: replace usage of sleep_on_...() with
  wait_event_interruptible_timeout()

- dvb-core: fix dvb_ringbuffer_read/write() buffer pointer bug

- video: added VIDEO_EVENT_FRAME_RATE_CHANGED and VIDEO_GET_FRAME_RATE
  ioctl