arm64: dts: freescale: imx93-9x9-qsb: enable fsl,ext-reset-output for wdog3

The WDOG_B is connected to external PMIC, so set "fsl,ext-reset-output"
to enable triggering PMIC reset.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Author: MrVan

arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts

@@ -459,6 +459,9 @@
 };
 
 &wdog3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_wdog>;
+	fsl,ext-reset-output;
 	status = "okay";
 };
 
@@ -646,4 +649,10 @@
 			MX93_PAD_SD2_VSELECT__USDHC2_VSELECT	0x51e
 		>;
 	};
+
+	pinctrl_wdog: wdoggrp {
+		fsl,pins = <
+			MX93_PAD_WDOG_ANY__WDOG1_WDOG_ANY	0x31e
+		>;
+	};
 };