ARM: tegra: colibri_t20: add gpio hog to unreset usb ethernet chip

Add GPIO hog to unreset ASIX AX88772B USB Ethernet chip.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra20-colibri.dtsi

@@ -749,3 +749,12 @@ sound {
 		clock-names = "pll_a", "pll_a_out0", "mclk";
 	};
 };
+
+&gpio {
+	lan-reset-n {
+		gpio-hog;
+		gpios = <TEGRA_GPIO(V, 4) GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "LAN_RESET#";
+	};
+};