ath79: convert WD MyNet Range Extender to gpio-keys

This patch converts the Range Extender to use the
interrupt-driven gpio-keys driver over the polled variant.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

target/linux/ath79/dts/ar9344_wd_mynet-wifi-rangeextender.dts

@@ -58,26 +58,22 @@
 	};
 
 	keys {
-		compatible = "gpio-keys-polled";
-		poll-interval = <50>;
+		compatible = "gpio-keys";
 
 		reset {
 			linux,code = <KEY_RESTART>;
 			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
-			debounce-interval = <60>;
 		};
 
 		band-switch {
 			linux,code = <BTN_1>;
 			gpios = <&gpio 14 GPIO_ACTIVE_HIGH>;
 			linux,input-type = <EV_SW>;
-			debounce-interval = <60>;
 		};
 
 		wps {
 			linux,code = <KEY_WPS_BUTTON>;
 			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
-			debounce-interval = <60>;
 		};
 	};
 };