ramips: fix HiWiFi HC5962 status LED

Match LED behavior to stock firmware:

Red: booting
White: running

Signed-off-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>
(cherry picked from commit 9a3c9a9656)

target/linux/ramips/dts/HC5962.dts

@@ -10,8 +10,8 @@
 	model = "HiWiFi HC5962";
 
 	aliases {
-		led-boot = &led_status;
-		led-failsafe = &led_status;
+		led-boot = &led_system;
+		led-failsafe = &led_system;
 		led-running = &led_status;
 		led-upgrade = &led_status;
 	};
@@ -33,9 +33,10 @@
 			gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
 		};
 
-		system {
+		led_system: system {
 			label = "hc5962:red:system";
 			gpios = <&gpio0 7 GPIO_ACTIVE_LOW>;
+			panic-indicator;
 		};
 	};