Optional properties:
- dual_emac_res_vlan : Specifies VID to be used to segregate the ports
-- mac-address : See ethernet.txt file in the same directory
- phy_id : Specifies slave phy id (deprecated, use phy-handle)
- phy-handle : See ethernet.txt file in the same directory
+The MAC address will be determined using the optional properties
+defined in ethernet.txt.
+
Slave sub-nodes:
- fixed-link : See fixed-link.txt file in the same directory