Add METADATA to am57x: Apache2+MIT=NOTICE am: 5b0ad87878 am: 09c67206f6 am: d2d2ed5dc1

Change-Id: I5467543ba1c7a875cca438ea166ebff57c5f9718
diff --git a/METADATA b/METADATA
new file mode 100644
index 0000000..d97975c
--- /dev/null
+++ b/METADATA
@@ -0,0 +1,3 @@
+third_party {
+  license_type: NOTICE
+}