Creating a p4runtime default driver to avoid code duplication between bmv2 and barefoot drivers

Change-Id: Id7f16a284c65278ec1a9ec682da01ddf020343c8
diff --git a/drivers/bmv2/BUCK b/drivers/bmv2/BUCK
index a8dfd58..30ee2ab 100644
--- a/drivers/bmv2/BUCK
+++ b/drivers/bmv2/BUCK
@@ -31,5 +31,6 @@
         'org.onosproject.generaldeviceprovider',
         'org.onosproject.protocols.p4runtime',
         'org.onosproject.p4runtime',
+        'org.onosproject.drivers.p4runtime'
     ],
 )