ramips: fix wps button gpio for DWR-512

The WPS button is at GPIO#7.

Signed-off-by: Giuseppe Lippolis <[email protected]>

target/linux/ramips/dts/DWR-512-B.dts

@@ -17,7 +17,7 @@
 
 		wps {
 			label = "wps";
-			gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
+			gpios = <&gpio0 7 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_WPS_BUTTON>;
 		};