docs-rst: add sound book to pdf output

The sound subsystem book was added without the bits required to
generate PDF output. Add them.

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

1 files changed, 10 insertions, 0 deletions

diff --git a/Documentation/sound/conf.py b/Documentation/sound/conf.py
new file mode 100644
index 000000000000..3f1fc5e74e7b
--- /dev/null
+++ b/Documentation/sound/conf.py
@@ -0,0 +1,10 @@
+# -*- coding: utf-8; mode: python -*-
+
+project = "Linux Sound Subsystem Documentation"
+
+tags.add("subproject")
+
+latex_documents = [
+    ('index', 'sound.tex', project,
+     'The kernel development community', 'manual'),
+]