ARM: dts: imx6-sr-som: add ethernet PHY configuration

Add ethernet PHY configuration ahead of removing the quirk that
configures the clocking mode for the PHY.  The RGMII delay is
already set correctly.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-sr-som.dtsi

@@ -53,10 +53,21 @@ vcc_3v3: regulator-vcc-3v3 {
 &fec {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_microsom_enet_ar8035>;
+	phy-handle = <&phy>;
 	phy-mode = "rgmii-id";
 	phy-reset-duration = <2>;
 	phy-reset-gpios = <&gpio4 15 GPIO_ACTIVE_LOW>;
 	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		phy: ethernet-phy@0 {
+			reg = <0>;
+			qca,clk-out-frequency = <125000000>;
+		};
+	};
 };
 
 &iomuxc {