arm64: dts: renesas: white-hawk-cpu: Add GP LEDs

Describe the three General Purpose LEDs on the White Hawk CPU board, so
they can be used as indicator LEDs.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/007acd941ef925057f1f9b925ed4e339dbd29a74.1662715538.git.geert+renesas@glider.be

arch/arm64/boot/dts/renesas/r8a779g0-white-hawk-cpu.dtsi

@@ -7,10 +7,38 @@
 
 #include "r8a779g0.dtsi"
 
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+
 / {
 	model = "Renesas White Hawk CPU board";
 	compatible = "renesas,white-hawk-cpu", "renesas,r8a779g0";
 
+	leds {
+		compatible = "gpio-leds";
+
+		led-1 {
+			gpios = <&gpio7 0 GPIO_ACTIVE_HIGH>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_INDICATOR;
+			function-enumerator = <1>;
+		};
+
+		led-2 {
+			gpios = <&gpio7 1 GPIO_ACTIVE_HIGH>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_INDICATOR;
+			function-enumerator = <2>;
+		};
+
+		led-3 {
+			gpios = <&gpio7 2 GPIO_ACTIVE_HIGH>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_INDICATOR;
+			function-enumerator = <3>;
+		};
+	};
+
 	memory@48000000 {
 		device_type = "memory";
 		/* first 128MB is reserved for secure area. */