ramips: mark toggle input on EX6150 as a switch

The Netgear EX6150 has an Access Point/Extender switch. Set it as
an EV_SW. Otherwise when it's set to Access Point, it will trigger
failsafe mode during boot.

Fixes: FS#3590
Signed-off-by: Kurt Roeckx <kurt@roeckx.be>

target/linux/ramips/dts/mt7621_netgear_ex6150.dts

@@ -86,6 +86,7 @@
 			label = "AP/Extender toggle";
 			gpios = <&gpio 48 GPIO_ACTIVE_LOW>;
 			linux,code = <BTN_0>;
+			linux,input-type = <EV_SW>;
 			/* Active when switch is set to "Access Point" */
 		};
 	};