docs-rst: conf.py: sort LaTeX documents in alphabetical order

As we add more documents, it makes more sense to sort the
entries there in alphabetical order, as it makes easier to
check if something is not there.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/conf.py

@@ -345,27 +345,28 @@ if major == 1 and minor > 3:
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
+# Sorted in alphabetical order
 latex_documents = [
-    ('doc-guide/index', 'kernel-doc-guide.tex', 'Linux Kernel Documentation Guide',
-     'The kernel development community', 'manual'),
     ('admin-guide/index', 'linux-user.tex', 'Linux Kernel User Documentation',
      'The kernel development community', 'manual'),
     ('core-api/index', 'core-api.tex', 'The kernel core API manual',
      'The kernel development community', 'manual'),
+    ('doc-guide/index', 'kernel-doc-guide.tex', 'Linux Kernel Documentation Guide',
+     'The kernel development community', 'manual'),
     ('driver-api/index', 'driver-api.tex', 'The kernel driver API manual',
      'The kernel development community', 'manual'),
+    ('gpu/index', 'gpu.tex', 'Linux GPU Driver Developer\'s Guide',
+     'The kernel development community', 'manual'),
     ('input/index', 'linux-input.tex', 'The Linux input driver subsystem',
      'The kernel development community', 'manual'),
     ('kernel-documentation', 'kernel-documentation.tex', 'The Linux Kernel Documentation',
      'The kernel development community', 'manual'),
     ('kernel-hacking/index', 'kernel-hacking.tex', 'Kernel Hacking Guides',
      'The kernel development community', 'manual'),
-    ('process/index', 'development-process.tex', 'Linux Kernel Development Documentation',
-     'The kernel development community', 'manual'),
-    ('gpu/index', 'gpu.tex', 'Linux GPU Driver Developer\'s Guide',
-     'The kernel development community', 'manual'),
     ('media/index', 'media.tex', 'Linux Media Subsystem Documentation',
      'The kernel development community', 'manual'),
+    ('process/index', 'development-process.tex', 'Linux Kernel Development Documentation',
+     'The kernel development community', 'manual'),
     ('security/index', 'security.tex', 'The kernel security subsystem manual',
      'The kernel development community', 'manual'),
 ]