[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/Documentation/sound/index.rst b/src/kernel/linux/v4.14/Documentation/sound/index.rst
new file mode 100644
index 0000000..47b89f0
--- /dev/null
+++ b/src/kernel/linux/v4.14/Documentation/sound/index.rst
@@ -0,0 +1,20 @@
+===================================
+Linux Sound Subsystem Documentation
+===================================
+
+.. toctree::
+ :maxdepth: 2
+
+ kernel-api/index
+ designs/index
+ soc/index
+ alsa-configuration
+ hd-audio/index
+ cards/index
+
+.. only:: subproject
+
+ Indices
+ =======
+
+ * :ref:`genindex`