arm64: dts: imx8mq-librem5: set debounce interval of volume buttons to 50ms

The default of 5ms is too low.
Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi

@@ -40,12 +40,14 @@ vol-down {
 			label = "VOL_DOWN";
 			gpios = <&gpio1 17 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_VOLUMEDOWN>;
+			debounce-interval = <50>;
 		};
 
 		vol-up {
 			label = "VOL_UP";
 			gpios = <&gpio1 16 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_VOLUMEUP>;
+			debounce-interval = <50>;
 		};
 	};