arm64: dts: imx8mq-sr-som: Replace deprecated phy reset properties

Use preferred properties of phy node instead of deprecated
phy-reset-gpios (and others).  This avoids copying deprecated code into
future DTSes.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mq-sr-som.dtsi

@@ -20,8 +20,6 @@ &fec1 {
 	pinctrl-0 = <&pinctrl_fec1>;
 	phy-mode = "rgmii-id";
 	phy-handle = <&ethphy0>;
-	phy-reset-gpios = <&gpio1 9 GPIO_ACTIVE_LOW>;
-	phy-reset-duration = <2>;
 	fsl,magic-packet;
 	status = "okay";
 
@@ -32,6 +30,8 @@ mdio {
 		ethphy0: ethernet-phy@4 {
 			compatible = "ethernet-phy-ieee802.3-c22";
 			reg = <4>;
+			reset-gpios = <&gpio1 9 GPIO_ACTIVE_LOW>;
+			reset-assert-us = <2000>;
 		};
 	};
 };