arm64: dts: rockchip: fix gmac support for NanoPi R5S

- Changed phy-mode to rgmii.

- Fixed pull type in pinctrl for gmac0.

- Removed duplicate properties in mdio node.
  These properties are defined in the gmac0 node already.
Signed-off-by: Tianling Shen <cnsztl@gmail.com>
Link: https://lore.kernel.org/r/20230318083745.6181-5-cnsztl@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3568-nanopi-r5s.dts

@@ -57,7 +57,7 @@ &gmac0 {
 	assigned-clock-rates = <0>, <125000000>;
 	clock_in_out = "output";
 	phy-handle = <&rgmii_phy0>;
-	phy-mode = "rgmii-id";
+	phy-mode = "rgmii";
 	pinctrl-names = "default";
 	pinctrl-0 = <&gmac0_miim
 		     &gmac0_tx_bus2
@@ -79,9 +79,6 @@ rgmii_phy0: ethernet-phy@1 {
 		reg = <1>;
 		pinctrl-0 = <&eth_phy0_reset_pin>;
 		pinctrl-names = "default";
-		reset-assert-us = <10000>;
-		reset-deassert-us = <50000>;
-		reset-gpios = <&gpio0 RK_PC4 GPIO_ACTIVE_LOW>;
 	};
 };
 
@@ -115,7 +112,7 @@ &pcie3x2 {
 &pinctrl {
 	gmac0 {
 		eth_phy0_reset_pin: eth-phy0-reset-pin {
-			rockchip,pins = <0 RK_PC4 RK_FUNC_GPIO &pcfg_pull_down>;
+			rockchip,pins = <0 RK_PC4 RK_FUNC_GPIO &pcfg_pull_up>;
 		};
 	};