ARM: dts: atlas7: Fix "debounce-interval" property misspelling

"debounce_interval" was never supported.

Link: https://lore.kernel.org/r/20191101160356.32034-3-geert+renesas@glider.beSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Barry Song <baohua@kernel.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/boot/dts/atlas7-evb.dts

@@ -119,7 +119,7 @@ rearview_key {
 				label = "rearview key";
 				linux,code = <KEY_CAMERA>;
 				gpios = <&gpio_1 3 GPIO_ACTIVE_LOW>;
-				debounce_interval = <100>;
+				debounce-interval = <100>;
 			};
 		};