Sphinx reports missing toctree entry warning for co-processor
acceleration API docs:

Documentation/sound/designs/compress-accel.rst: WARNING: document isn't included in any toctree

Add the missing entry to fix the warning.

Fixes: 04177158cf98 ("ALSA: compress_offload: introduce accel operation mode")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
---
 Documentation/sound/designs/index.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/sound/designs/index.rst b/Documentation/sound/designs/index.rst
index b79db9ad87325a..6b825c5617fc16 100644
--- a/Documentation/sound/designs/index.rst
+++ b/Documentation/sound/designs/index.rst
@@ -6,6 +6,7 @@ Designs and Implementations
 
    control-names
    channel-mapping-api
+   compress-accel
    compress-offload
    timestamping
    jack-controls
-- 
An old man doll... just what I always wanted! - Clara