ALSA: doc: Add codecs/index.rst to top-level index

JIRA: https://issues.redhat.com/browse/RHEL-80681

commit 080505f
Author: Richard Fitzgerald <rf@opensource.cirrus.com>
Date: Thu Jan 9 10:56:57 2025 +0000

    ALSA: doc: Add codecs/index.rst to top-level index

    commit 088fb4e ("ALSA: doc: cs35l56: Add information about
    Cirrus Logic CS35L54/56/57") added a new subdirectory with an index
    file, so this file must be added to the top-level index.

    Fixes: 088fb4e ("ALSA: doc: cs35l56: Add information about Cirrus Logic CS35L54/56/57")
    Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
    Link: https://patch.msgid.link/20250109105657.96860-1-rf@opensource.cirrus.com
    Signed-off-by: Mark Brown <broonie@kernel.org>

Signed-off-by: Jaroslav Kysela <jkysela@redhat.com>

Author: jkysela-rh

Documentation/sound/index.rst

@@ -13,6 +13,7 @@ Sound Subsystem Documentation
    alsa-configuration
    hd-audio/index
    cards/index
+   codecs/index
    utimers
 
 .. only::  subproject and html