LLDP: Add Management Address TLV

- Management Address TLV is added as per IEEE Std 802.1AB-2009.
- Support of management ipv4/ipv6 addresses and OID.

Change-Id: I57c14741774390809ce5a829cc087947424432c7
Signed-off-by: Steve Shin <jonshin@cisco.com>
diff --git a/src/vnet/lldp/lldp_node.h b/src/vnet/lldp/lldp_node.h
index 14a10e3..eca1d12 100644
--- a/src/vnet/lldp/lldp_node.h
+++ b/src/vnet/lldp/lldp_node.h
@@ -46,6 +46,14 @@
   /* Local info */
   u8 *port_desc;
 
+  /* management ipv4 address */
+  u8 *mgmt_ip4;
+
+  /* management ipv6 address */
+  u8 *mgmt_ip6;
+
+  /* management object identifier */
+  u8 *mgmt_oid;
 } lldp_intf_t;
 
 typedef struct