[PATCH v2 8/8] Docs/sound/index: Add missing SPDX License Identifier

[SeongJae Park]

Add missing SPDX License Identifier for sound documentation index file.

Signed-off-by: SeongJae Park <sj at kernel.org>
---
 Documentation/sound/index.rst | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/sound/index.rst b/Documentation/sound/index.rst
index 5abed5fc6485..7e67e12730d3 100644
--- a/Documentation/sound/index.rst
+++ b/Documentation/sound/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GPL-2.0
+
 =============================
 Sound Subsystem Documentation
 =============================
-- 
2.25.1