ARM64: dts: meson-gxbb-nexbox-a95x: add the ethernet PHY's reset GPIO

This resets the ethernet PHY during boot to get the PHY into a "clean"
state.
While here also specify the phy-handle of the ethmac node to make the
PHY configuration similar to the one we have on GXL devices. This will
allow us to specify OF-properties for the PHY itself.
Signed-off-by: NMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: NNeil Armstrong <narmstrong@baylibre.com>
Reviewed-by: NJerome Brunet <jbrunet@baylibre.com>
Signed-off-by: NKevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-gxbb-nexbox-a95x.dts

@@ -164,7 +164,24 @@
 	status = "okay";
 	pinctrl-0 = <&eth_rmii_pins>;
 	pinctrl-names = "default";
+
+	phy-handle = <&eth_phy0>;
 	phy-mode = "rmii";
+
+	snps,reset-gpio = <&gpio GPIOZ_14 0>;
+	snps,reset-delays-us = <0 10000 1000000>;
+	snps,reset-active-low;
+
+	mdio {
+		compatible = "snps,dwmac-mdio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		eth_phy0: ethernet-phy@0 {
+			/* IC Plus IP101GR (0x02430c54) */
+			reg = <0>;
+		};
+	};
 };
 
 &ir {