ARM: dts: stm32: Update red led node for stm32mp157a-dk1-u-boot

As indicated in kernel led dt-bindings, label is a deprecated
property, so remove it and use red led node's name instead
for u-boot,error-led property.
Rename red led node's name to led-red.
Remove status property which is useless.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi b/arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi
index ee9b51d..92153b2 100644
--- a/arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi
+++ b/arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi
@@ -16,7 +16,7 @@
 
 	config {
 		u-boot,boot-led = "heartbeat";
-		u-boot,error-led = "error";
+		u-boot,error-led = "led-red";
 		u-boot,mmc-env-partition = "fip";
 		st,adc_usb_pd = <&adc1 18>, <&adc1 19>;
 	};
@@ -64,10 +64,8 @@
 	};
 
 	led {
-		red {
-			label = "error";
+		led-red {
 			gpios = <&gpioa 13 GPIO_ACTIVE_LOW>;
-			status = "okay";
 		};
 	};
 };