The pinctrl node was missing which change the pin mux to GPIO mode. Add
it.

Fixes: 79d83b3a458e ("ARM: dts: lan966x: add basic Kontron KSwitch D10 support")
Signed-off-by: Michael Walle <mwalle@kernel.org>
---
 arch/arm/boot/dts/lan966x-kontron-kswitch-d10-mmt.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/lan966x-kontron-kswitch-d10-mmt.dtsi b/arch/arm/boot/dts/lan966x-kontron-kswitch-d10-mmt.dtsi
index 0097e72e3fb2..f86e2e751403 100644
--- a/arch/arm/boot/dts/lan966x-kontron-kswitch-d10-mmt.dtsi
+++ b/arch/arm/boot/dts/lan966x-kontron-kswitch-d10-mmt.dtsi
@@ -17,6 +17,8 @@ chosen {
 	};
 
 	gpio-restart {
+		pinctrl-0 = <&reset_pins>;
+		pinctrl-names = "default";
 		compatible = "gpio-restart";
 		gpios = <&gpio 56 GPIO_ACTIVE_LOW>;
 		priority = <200>;
@@ -59,6 +61,12 @@ miim_c_pins: miim-c-pins {
 		function = "miim_c";
 	};
 
+	reset_pins: reset-pins {
+		/* SYS_RST# */
+		pins = "GPIO_56";
+		function = "gpio";
+	};
+
 	sgpio_a_pins: sgpio-a-pins {
 		/* SCK, D0, D1 */
 		pins = "GPIO_32", "GPIO_33", "GPIO_34";

-- 
2.30.2