ramips: fixed sms led polarity into dwr-512 DT

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

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

@@ -33,7 +33,7 @@
 
 		sms {
 			label = "dwr-512-b:green:sms";
-			gpios = <&gpio0 8 GPIO_ACTIVE_LOW>;
+			gpios = <&gpio0 8 GPIO_ACTIVE_HIGH>;
 		};
 		status {
 			label = "dwr-512-b:green:status";