ARM: dts: imx6: RDU2: Add Micrel PHY to FEC

The FEC has a Micrel PHY connected to it. This PHY is managed using
the bit-banging MDIO bus. Add this to the device tree.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Chris Healy <cphealy@gmail.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi

@@ -59,6 +59,10 @@ mdio1: mdio {
 		pinctrl-0 = <&pinctrl_mdio1>;
 		gpios = <&gpio6 5 GPIO_ACTIVE_HIGH
 		         &gpio6 4 GPIO_ACTIVE_HIGH>;
+
+		phy: ethernet-phy@0 {
+			reg = <0>;
+		};
 	};
 
 	reg_28p0v: regulator-28p0v {
@@ -615,15 +619,11 @@ &fec {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_enet>;
 	phy-mode = "rmii";
+	phy-handle = <&phy>;
 	phy-reset-gpios = <&gpio1 23 GPIO_ACTIVE_LOW>;
 	phy-reset-duration = <100>;
 	phy-supply = <&reg_3p3v>;
 	status = "okay";
-
-	fixed-link {
-		speed = <100>;
-		full-duplex;
-	};
 };
 
 &usbh1 {