Add repo for mtk audio ucm files.

Change-Id: I7d2573abc477bcabe61e67a30827c5fcc39ccf9f
diff --git a/excelsior.xml b/excelsior.xml
index ac9eb8f..03c9c5d 100644
--- a/excelsior.xml
+++ b/excelsior.xml
@@ -62,6 +62,8 @@
     <project remote="excelsior" path="packages/excelsior-nvram"
       name="excelsior-mendel/packages/excelsior-nvram" />
     <project path="packages/edgetpu-api" name="python-tflite-source" />
+    <project remote="excelsior" path="packages/mtk-board-audio"
+      name="excelsior-mendel/packages/mtk-board-audio" />
     <!-- END mtk packages repos -->
 
     <!-- END Excelsior specfic repos -->