ARM: dts: exynos: Fix "debounce-interval" property misspelling in Midas

"debounce-inteval" was never supported.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/boot/dts/exynos4412-midas.dtsi

@@ -127,7 +127,7 @@ key-ok {
 			gpios = <&gpx0 1 GPIO_ACTIVE_LOW>;
 			linux,code = <139>;
 			label = "ok";
-			debounce-inteval = <10>;
+			debounce-interval = <10>;
 			wakeup-source;
 		};
 	};