net: Add header file for generic link address

It only describes the structure for now, but will then provide helpers.

Change-Id: I7ac7717a3289086dac50d90e25b2a1ce7d7abc91
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>

include/net/net_linkaddr.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2016 Intel Corporation.
+ *
+ * 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.
+ */
+
+/**
+ * @file
+ * @brief Public API for network link address
+ */
+
+#ifndef __NET_LINKADDR_H__
+#define __NET_LINKADDR_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ *  @brief Hardware link address structure
+ *
+ *  Used to hold the link address information
+ */
+struct net_linkaddr {
+	/** The array of byte representing the address */
+	uint8_t *addr;
+	/** Length of that address array */
+	uint8_t len;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __NET_LINKADDR_H__ */