doc-rst: add stand-alone conf.py to media folder

With the media/conf.py, and media/index.rst the media folder can be
build and distributed stand-alone.
Signed-off-by: NMarkus Heiser <markus.heiser@darmarIT.de>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

Documentation/index.rst

@@ -6,18 +6,13 @@
 Welcome to The Linux Kernel's documentation!
 ============================================
 
-Nothing for you to see here *yet*. Please move along.
-
 Contents:
 
 .. toctree::
    :maxdepth: 2
 
    kernel-documentation
-   media/media_uapi
-   media/media_kapi
-   media/dvb-drivers/index
-   media/v4l-drivers/index
+   media/index
    gpu/index
 
 Indices and tables

Documentation/media/conf.py

+# -*- coding: utf-8; mode: python -*-
+
+project = 'Linux Media Subsystem Documentation'

Documentation/media/index.rst

+Linux Media Subsystem Documentation
+===================================
+
+Contents:
+
+.. toctree::
+   :maxdepth: 2
+
+   media_uapi
+   media_kapi
+   dvb-drivers/index
+   v4l-drivers/index