ralink: add FireWRT IO multiplexing

Signed-off-by: wengbj <fl.service@t-firefly.com>

SVN-Revision: 44660

target/linux/ramips/dts/FIREWRT.dts

@@ -105,4 +105,12 @@
 		};
 	};
 
+	pinctrl {
+		state_default: pinctrl0 {
+		gpio {
+				ralink,group = "wdt", "rgmii2";
+				ralink,function = "gpio";
+			};
+		};
+	};
 };