network device. This is used by the bootwrapper to interpret
MAC addresses passed by the firmware when no information other
than indices is available to associate an address with a device.
+ - phy-connection-type : a string naming the controller/PHY interface type,
+ i.e., "mii" (default), "rmii", "gmii", "rgmii", "rgmii-id", "tbi",
+ or "rtbi".
Example:
ucc@2000 {
rx-clock = "none";
tx-clock = "clk9";
phy-handle = <212000>;
+ phy-connection-type = "gmii";
pio-handle = <140001>;
};