arm64: dts: microchip: sparx5_pcb135: drop LED unit addresses

GPIO leds should not have unit addresses (no "reg" property), as
reported by dtc W=1 warnings:

  sparx5_pcb135_board.dtsi:18.9-22.5: Warning (unit_address_vs_reg): /leds/led@0: node has a unit name, but no reg or ranges property

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Steen Hegelund <Steen.Hegelund@microchip.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

Author: krzk

arch/arm64/boot/dts/microchip/sparx5_pcb135_board.dtsi

@@ -15,42 +15,42 @@
 
 	leds {
 		compatible = "gpio-leds";
-		led@0 {
+		led-0 {
 			label = "eth60:yellow";
 			gpios = <&sgpio_out1 28 0 GPIO_ACTIVE_LOW>;
 			default-state = "off";
 		};
-		led@1 {
+		led-1 {
 			label = "eth60:green";
 			gpios = <&sgpio_out1 28 1 GPIO_ACTIVE_LOW>;
 			default-state = "off";
 		};
-		led@2 {
+		led-2 {
 			label = "eth61:yellow";
 			gpios = <&sgpio_out1 29 0 GPIO_ACTIVE_LOW>;
 			default-state = "off";
 		};
-		led@3 {
+		led-3 {
 			label = "eth61:green";
 			gpios = <&sgpio_out1 29 1 GPIO_ACTIVE_LOW>;
 			default-state = "off";
 		};
-		led@4 {
+		led-4 {
 			label = "eth62:yellow";
 			gpios = <&sgpio_out1 30 0 GPIO_ACTIVE_LOW>;
 			default-state = "off";
 		};
-		led@5 {
+		led-5 {
 			label = "eth62:green";
 			gpios = <&sgpio_out1 30 1 GPIO_ACTIVE_LOW>;
 			default-state = "off";
 		};
-		led@6 {
+		led-6 {
 			label = "eth63:yellow";
 			gpios = <&sgpio_out1 31 0 GPIO_ACTIVE_LOW>;
 			default-state = "off";
 		};
-		led@7 {
+		led-7 {
 			label = "eth63:green";
 			gpios = <&sgpio_out1 31 1 GPIO_ACTIVE_LOW>;
 			default-state = "off";