ARM: at91/dt: at91sam9n12ek: fix the led labels name

Correct the led labels in at91sam9n12ek.
Signed-off-by: NJosh Wu <josh.wu@atmel.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/boot/dts/at91sam9n12ek.dts

@@ -204,13 +204,13 @@
 		};
 
 		d9 {
-			label = "d6";
+			label = "d9";
 			gpios = <&pioB 5 GPIO_ACTIVE_LOW>;
 			linux,default-trigger = "nand-disk";
 		};
 
 		d10 {
-			label = "d7";
+			label = "d10";
 			gpios = <&pioB 6 GPIO_ACTIVE_HIGH>;
 			linux,default-trigger = "heartbeat";
 		};