[media] doc-rst: backward compatibility with older Sphinx versions

Sphinx is really evil when an older version finds an extra
attribute for the :toctree: tag: it simply ignores everything
and produce documents without any chapter inside!

As we're now using tags available only on Sphinx 1.4.x, we
need to use some creative ways to add a title before the
table of contents. Do that by using a css class.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/media/v4l-drivers/index.rst

@@ -14,12 +14,13 @@ any later version published by the Free Software Foundation. A copy of
 the license is included in the chapter entitled "GNU Free Documentation
 License".
 
+.. class:: toc-title
+
+        Table of Contents
 
 .. toctree::
 	:maxdepth: 5
 	:numbered:
-	:caption: Table of Contents
-	:name: v4l_mastertoc
 
 	fourcc
 	v4l-with-ir