Added P4Runtime-based Barefoot Tofino driver

Change-Id: I09ba8dd4468fa5a792ca481921e8a51dad49702e
diff --git a/drivers/barefoot/src/main/java/org/onosproject/drivers/barefoot/BarefootDriversLoader.java b/drivers/barefoot/src/main/java/org/onosproject/drivers/barefoot/BarefootDriversLoader.java
new file mode 100644
index 0000000..41ab063
--- /dev/null
+++ b/drivers/barefoot/src/main/java/org/onosproject/drivers/barefoot/BarefootDriversLoader.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.drivers.barefoot;
+
+import org.apache.felix.scr.annotations.Component;
+import org.onosproject.net.driver.AbstractDriverLoader;
+
+/**
+ * Loader for the Barefoot device drivers.
+ */
+@Component(immediate = true)
+public class BarefootDriversLoader extends AbstractDriverLoader {
+
+    public BarefootDriversLoader() {
+        super("/barefoot-drivers.xml");
+    }
+}