docs: Fix some broken references

As we move stuff around, some doc references are broken. Fix some of
them via this script:
	./scripts/documentation-file-ref-check --fix

Manually checked if the produced result is valid, removing a few
false-positives.

Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Coly Li <colyli@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>

drivers/media/platform/pxa_camera.c

@@ -1021,7 +1021,7 @@ static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev,
  *  - a videobuffer is queued on the pcdev->capture list
  *
  * Please check the "DMA hot chaining timeslice issue" in
- *   Documentation/video4linux/pxa_camera.txt
+ *   Documentation/media/v4l-drivers/pxa_camera.rst
  *
  * Context: should only be called within the dma irq handler
  */
@@ -1443,7 +1443,7 @@ static void pxac_vb2_queue(struct vb2_buffer *vb)
 
 /*
  * Please check the DMA prepared buffer structure in :
- *   Documentation/video4linux/pxa_camera.txt
+ *   Documentation/media/v4l-drivers/pxa_camera.rst
  * Please check also in pxa_camera_check_link_miss() to understand why DMA chain
  * modification while DMA chain is running will work anyway.
  */