Added dummy cavium driver

Change-Id: Idf1487f881d97897f3ac02554dfb71cca749ef3a
diff --git a/mwc.defs b/mwc.defs
index 2eb36ad..a7312a7 100644
--- a/mwc.defs
+++ b/mwc.defs
@@ -3,6 +3,7 @@
 MWC_APPS = [
     '//pipelines/fabric-pro:onos-pipelines-fabric-pro-oar',
     '//drivers/barefoot-pro:onos-drivers-barefoot-pro-oar',
+    '//drivers/cavium-pro:onos-drivers-cavium-pro-oar',
 ]
 
 APPS = APPS + MWC_APPS