ARM: dts: bcm63138: change "interupts" to "interrupts"

all other nodes in bcm63138.dtsi use "interrupts", this had to be just a typo
which never got noticed, even it may have quite some consequences.
Signed-off-by: Radek Dostal <radek.dostal@streamunlimited.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

arch/arm/boot/dts/bcm63138.dtsi

@@ -102,7 +102,7 @@ local_timer: local-timer@1e600 {
 		twd_watchdog: watchdog@1e620 {
 			compatible = "arm,cortex-a9-twd-wdt";
 			reg = <0x1e620 0x20>;
-			interupts = <GIC_PPI 14 IRQ_TYPE_LEVEL_HIGH>;
+			interrupts = <GIC_PPI 14 IRQ_TYPE_LEVEL_HIGH>;
 		};
 	};