Enhance the LLDPTLV.java to handle the LLDP port ID
subtypes 3 (MAC) in addition to 7 (Local).
Many Ethernet switches take MAC addresses as the
port IDs.

Change-Id: I8a0d0e5cf0e914a9fe77acd3d0d4787a2ac98760
Signed-off-by: Paiwei Wang <pwwang@itri.org.tw>
Merge "Enhance the LLDPTLV.java to handle the LLDP port ID subtypes 3 (MAC) in addition to 7 (Local). Many Ethernet switches take MAC addresses as the port IDs."