media: docs: add an uAPI chapter for driver-specific stuff

There are some uAPI stuff that are driver-specific. Add them
to the main media uAPI body.

Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

Documentation/media/index.rst

···
    ../userspace-api/media/index
    ../driver-api/media/index
 
-   v4l-drivers/index
-
 .. only:: html and subproject
 
    Indices

Documentation/media/v4l-drivers/index.rst Documentation/userspace-api/media/drivers/index.rst

···
 
 .. include:: <isonum.txt>
 
-.. _v4l-drivers:
+.. _v4l-drivers_uapi:
 
 ################################################
 Video4Linux (V4L)  driver-specific documentation
···
 	:maxdepth: 5
 	:numbered:
 
-	max2175
-	uvcvideo
-
 	cx2341x-uapi
 	imx-uapi
+	max2175
 	meye-uapi
 	omap3isp-uapi
+	uvcvideo

Documentation/userspace-api/media/index.rst

···
     cec/cec-api
     gen-errors
     fdl-appendix
+
+    drivers/index

Documentation/userspace-api/media/v4l/dev-sliced-vbi.rst

···
 *Historical context*: This format specification originates from a
 custom, embedded, sliced VBI data format used by the ``ivtv`` driver.
 This format has already been informally specified in the kernel sources
-in the file ``Documentation/media/v4l-drivers/cx2341x-uapi.rst`` . The
+in the file ``Documentation/userspace-api/media/drivers/cx2341x-uapi.rst`` . The
 maximum size of the payload and other aspects of this format are driven
 by the CX23415 MPEG decoder's capabilities and limitations with respect
 to extracting, decoding, and displaying sliced VBI data embedded within

Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst

···
     * - ``V4L2_MPEG_STREAM_VBI_FMT_IVTV``
       - VBI in private packets, IVTV format (documented in the kernel
 	sources in the file
-	``Documentation/media/v4l-drivers/cx2341x-uapi.rst``)
+	``Documentation/userspace-api/media/drivers/cx2341x-uapi.rst``)
 
 
 

Documentation/userspace-api/media/v4l/pixfmt-reserved.rst

···
       - YUV 4:2:0 format used by the IVTV driver.
 
 	The format is documented in the kernel sources in the file
-	``Documentation/media/v4l-drivers/cx2341x-uapi.rst``
+	``Documentation/userspace-api/media/drivers/cx2341x-uapi.rst``
     * .. _V4L2-PIX-FMT-CPIA1:
 
       - ``V4L2_PIX_FMT_CPIA1``

MAINTAINERS

···
 S:	Maintained
 T:	git git://linuxtv.org/media_tree.git
 F:	Documentation/devicetree/bindings/media/i2c/max2175.txt
-F:	Documentation/media/v4l-drivers/max2175.rst
+F:	Documentation/userspace-api/media/drivers/max2175.rst
 F:	drivers/media/i2c/max2175*
 F:	include/uapi/linux/max2175.h
 
···
 MOTION EYE VAIO PICTUREBOOK CAMERA DRIVER
 S:	Orphan
 W:	http://popies.net/meye/
-F:	Documentation/media/v4l-drivers/meye*
+F:	Documentation/userspace-api/media/drivers/meye*
 F:	drivers/media/pci/meye/
 F:	include/uapi/linux/meye.h
 

drivers/media/i2c/max2175.c

···
 
 /*
  * I2S output enable/disable configuration. This is a private control.
- * Refer to Documentation/media/v4l-drivers/max2175.rst for more details.
+ * Refer to Documentation/userspace-api/media/drivers/max2175.rst for more details.
  */
 static const struct v4l2_ctrl_config max2175_i2s_en = {
 	.ops = &max2175_ctrl_ops,
···
 
 /*
  * HSLS value control LO freq adjacent location configuration.
- * Refer to Documentation/media/v4l-drivers/max2175.rst for more details.
+ * Refer to Documentation/userspace-api/media/drivers/max2175.rst for more details.
  */
 static const struct v4l2_ctrl_config max2175_hsls = {
 	.ops = &max2175_ctrl_ops,
···
 /*
  * Rx modes below are a set of preset configurations that decides the tuner's
  * sck and sample rate of transmission. They are separate for EU & NA regions.
- * Refer to Documentation/media/v4l-drivers/max2175.rst for more details.
+ * Refer to Documentation/userspace-api/media/drivers/max2175.rst for more details.
  */
 static const char * const max2175_ctrl_eu_rx_modes[] = {
 	[MAX2175_EU_FM_1_2]	= "EU FM 1.2",