ramips: Use dts alias based status led

Also fix several typos in led node name.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>

target/linux/ramips/dts/WR1200JS.dts

@@ -9,6 +9,10 @@
 	compatible = "youhua,wr1200js", "mediatek,mt7621-soc";
 	model = "YouHua WR1200JS";
 
+	aliases {
+		led-status = &led_wps;
+	};
+
 	memory@0 {
 		device_type = "memory";
 		reg = <0x0 0x8000000>;
@@ -26,7 +30,7 @@
 			gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
 		};
 
-		wps {
+		led_wps: wps {
 			label = "wr1200js:blue:wps";
 			gpios = <&gpio0 7 GPIO_ACTIVE_LOW>;
 		};