mips: dts: realtek: Add restart to Cisco SG220-26P

Define a gpio-restart node to the Cisco SG220-26P so the device can be
rebooted using the SoC's hard reset pin. Set the priority to 192 so the
gpio-restart method takes priority over the watchdog restart.

Signed-off-by: Sander Vanheule <sander@svanheule.net>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

Author: svanheule

arch/mips/boot/dts/realtek/cisco_sg220-26.dts

@@ -4,6 +4,8 @@
 
 #include "rtl838x.dtsi"
 
+#include <dt-bindings/gpio/gpio.h>
+
 / {
 	model = "Cisco SG220-26";
 	compatible = "cisco,sg220-26", "realtek,rtl8382-soc";
@@ -17,6 +19,13 @@
 		device_type = "memory";
 		reg = <0x0 0x8000000>;
 	};
+
+	gpio-restart {
+		compatible = "gpio-restart";
+		gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
+		priority = <192>;
+		open-source;
+	};
 };
 
 &uart0 {