Removed WITH_DOUBLE_VLAN_TERMINATION when compiling bng profile

If defining WITH_BNG there is no need to define WITH_DOUBLE_VLAN_TERMINATION

Change-Id: Id7a49484a2f6e3d25ce9ac342c74eb76d02b802f
diff --git a/Makefile b/Makefile
index aa6cf13..7cb0f93 100755
--- a/Makefile
+++ b/Makefile
@@ -28,7 +28,7 @@
 	@${p4-build} fabric-simple "-DWITH_SIMPLE_NEXT"
 
 fabric-bng:
-	@${p4-build} fabric-bng "-DWITH_BNG -DWITH_DOUBLE_VLAN_TERMINATION -DWITHOUT_XCONNECT"
+	@${p4-build} fabric-bng "-DWITH_BNG -DWITHOUT_XCONNECT"
 
 fabric-int:
 	@${p4-build} fabric-int "-DWITH_INT_SOURCE -DWITH_INT_TRANSIT"