Documentation: iio: ade9000, adis*, adx*: Convert IIO subsystem cross-references

Cross-references to iio_tools.rst (IIO Interfacing Tools) and
iio_devbuf.rst (Industrial IIO device buffers) are shown in inline
code instead. Convert them to proper cross-references.

Signed-off-by: Bagas Sanjaya <[e-mail]>
Reviewed-by: Randy Dunlap <[e-mail]>
Tested-by: Randy Dunlap <[e-mail]>
Signed-off-by: Jonathan Cameron <[e-mail]>

Documentation/iio/ade9000.rst

···
 8. IIO Interfacing Tools
 ========================
 
-See ``Documentation/iio/iio_tools.rst`` for the description of the available IIO
+See Documentation/iio/iio_tools.rst for the description of the available IIO
 interfacing tools.

Documentation/iio/adis16475.rst

···
         00001740  01 1a 00 00 ff ff fe 31  00 00 46 aa 00 03 37 f7  |.......1..F...7.|
         ...
 
-See ``Documentation/iio/iio_devbuf.rst`` for more information about how buffered
+See Documentation/iio/iio_devbuf.rst for more information about how buffered
 data is structured.
 
 4. IIO Interfacing Tools
 ========================
 
-See ``Documentation/iio/iio_tools.rst`` for the description of the available IIO
+See Documentation/iio/iio_tools.rst for the description of the available IIO
 interfacing tools.

Documentation/iio/adis16480.rst

···
   00006b60  09 63 00 00 00 00 1b 13  00 00 22 2f 00 03 23 91  |.c........"/..#.|
   ...
 
-See ``Documentation/iio/iio_devbuf.rst`` for more information about how buffered
+See Documentation/iio/iio_devbuf.rst for more information about how buffered
 data is structured.
 
 4. IIO Interfacing Tools
 ========================
 
-See ``Documentation/iio/iio_tools.rst`` for the description of the available IIO
+See Documentation/iio/iio_tools.rst for the description of the available IIO
 interfacing tools.

Documentation/iio/adis16550.rst

···
         0000ceb0  00 00 0d 2f 00 00 05 25  00 00 07 8d 00 00 a2 ce  |.../...%........|
         ...
 
-See ``Documentation/iio/iio_devbuf.rst`` for more information about how buffered
+See Documentation/iio/iio_devbuf.rst for more information about how buffered
 data is structured.
 
 4. IIO Interfacing Tools
 ========================
 
-See ``Documentation/iio/iio_tools.rst`` for the description of the available IIO
+See Documentation/iio/iio_tools.rst for the description of the available IIO
 interfacing tools.

Documentation/iio/adxl345.rst

···
         00000f0   00004   00014   00015   00005   00012   00011   00005   00012
         ...
 
-See ``Documentation/iio/iio_devbuf.rst`` for more information about how buffered
+See Documentation/iio/iio_devbuf.rst for more information about how buffered
 data is structured.
 
 4. IIO Interfacing Tools
 ========================
 
-See ``Documentation/iio/iio_tools.rst`` for the description of the available IIO
+See Documentation/iio/iio_tools.rst for the description of the available IIO
 interfacing tools.

Documentation/iio/adxl380.rst

···
         002bc3c0  f7 fd 00 cb fb 94 24 80  f7 e3 00 f2 fb b8 24 80  |......$.......$.|
         ...
 
-See ``Documentation/iio/iio_devbuf.rst`` for more information about how buffered
+See Documentation/iio/iio_devbuf.rst for more information about how buffered
 data is structured.
 
 4. IIO Interfacing Tools
 ========================
 
-See ``Documentation/iio/iio_tools.rst`` for the description of the available IIO
+See Documentation/iio/iio_tools.rst for the description of the available IIO
 interfacing tools.