arm64: dts: imx8mp-phycore-som: Add gpio-line-names

Add gpio-line-names to the imx8mp-phycore-som devicetree.
Signed-off-by: Cem Tenruh <c.tenruh@phytec.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mp-phycore-som.dtsi

@@ -199,6 +199,19 @@ &wdog1 {
 	status = "okay";
 };
 
+&gpio1 {
+	gpio-line-names = "", "", "X_PMIC_WDOG_B", "",
+		"", "", "", "", "", "",
+		"", "", "", "", "", "X_nETHPHY_INT";
+};
+
+&gpio4 {
+	gpio-line-names = "", "", "", "",
+		"", "", "", "", "", "",
+		"", "", "", "", "", "",
+		"", "", "X_PMIC_IRQ_B";
+};
+
 &iomuxc {
 	pinctrl_fec: fecgrp {
 		fsl,pins = <