media: docs: Add a master topic for the index file

Right now, both V4L and Digital TV are shown as main titles.

Instead, add a main title, in order to better display its
output.

While here, simplify the file, as we don't need to add
a title for the indexes, nor we need copyright info, as
everything there is GPL, as stated by the SPDX tags.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Documentation/driver-api/media/drivers/index.rst

@@ -2,15 +2,12 @@
 
 .. include:: <isonum.txt>
 
-################################################
-Video4Linux (V4L)  driver-specific documentation
-################################################
+===================================
+Media driver-specific documentation
+===================================
 
-.. only:: html
-
-    .. class:: toc-title
-
-        Table of Contents
+Video4Linux (V4L) drivers
+=========================
 
 .. toctree::
 	:maxdepth: 5
@@ -30,28 +27,8 @@ Video4Linux (V4L)  driver-specific documentation
 	vimc-devel
 
 
-##############################################
-Linux Digital TV driver-specific documentation
-##############################################
-
-**Copyright** |copy| 2001-2016 : LinuxTV Developers
-
-This documentation is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the Free
-Software Foundation version 2 of the License.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-more details.
-
-For more details see the file COPYING in the source distribution of Linux.
-
-.. only:: html
-
-   .. class:: toc-title
-
-	Table of Contents
+Digital TV drivers
+==================
 
 .. toctree::
 	:maxdepth: 5