apm821xx: WNDAP6X0: convert to interrupt-driven gpio-key driver

This patch converts the device to use the gpio-key
over gpio-key-polled driver.

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

target/linux/apm821xx/dts/netgear-wndap6x0.dtsi

@@ -123,14 +123,11 @@
 
 &POB0 {
 	keys {
-		compatible = "gpio-keys-polled";
+		compatible = "gpio-keys";
-		#interrupt-cells = <2>;
-		poll-interval = <60>;   /* 3 * 20 = 60ms */
-		autorepeat;
 
 		reset {
 			label = "Reset Button";
-			gpios = <&GPIO0 16 GPIO_ACTIVE_HIGH>;
+			gpios = <&GPIO0 16 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_RESTART>;
 			interrupt-parent = <&UIC1>;
 			interrupts = <0x15 IRQ_TYPE_EDGE_FALLING>;