Change license from ONF-Member-Only to Apache-2.0

Change-Id: I031b31427f78d0c238342124638327fcc933ea29
diff --git a/Makefile b/Makefile
index 1abc5b7..4f890b1 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2021-present Open Networking Foundation <info@opennetworking.org>
 #
-# SPDX-License-Identifier: LicenseRef-ONF-Member-Only-1.0
+# SPDX-License-Identifier: Apache-2.0
 
 .PHONY: all clean