ARM: dts: stm32mp13: activate led on STM32MP13F-DK

Activate the led managed in stm32mp1 board for U-Boot indication
in STM32MP13F-DK device tree.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/arch/arm/dts/stm32mp135f-dk-u-boot.dtsi b/arch/arm/dts/stm32mp135f-dk-u-boot.dtsi
index dfe5bbb..cbe4eb5 100644
--- a/arch/arm/dts/stm32mp135f-dk-u-boot.dtsi
+++ b/arch/arm/dts/stm32mp135f-dk-u-boot.dtsi
@@ -11,8 +11,18 @@
 	};
 
 	config {
+		u-boot,boot-led = "led-blue";
+		u-boot,error-led = "led-red";
 		u-boot,mmc-env-partition = "u-boot-env";
 	};
+
+	leds {
+		led-red {
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&gpioa 13 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+		};
+	};
 };
 
 &uart4 {