ath79: indicate boot/failsafe/upgrade for NanoBeam/Nanostation AC

Like for Ubiquiti PowerBeam 5AC Gen2, the highest RSSI LED can
be exploited to indicate boot/failsafe/upgrade for the NanoBeam AC
and Nanostation AC as well.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
(cherry picked from commit 80a094aaf3247059846e7d857c236b4fa9e497c7)

target/linux/ath79/dts/ar9342_ubnt_nanobeam-ac.dts

@@ -10,6 +10,12 @@
 	compatible = "ubnt,nanobeam-ac", "ubnt,wa", "qca,ar9342";
 	model = "Ubiquiti NanoBeam AC (WA)";
 
+	aliases {
+		led-boot = &led_rssi3;
+		led-failsafe = &led_rssi3;
+		led-upgrade = &led_rssi3;
+	};
+
 	leds {
 		compatible = "gpio-leds";
 
@@ -28,7 +34,7 @@
 			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
 		};
 
-		rssi3 {
+		led_rssi3: rssi3 {
 			label = "ubnt:blue:rssi3";
 			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
 		};

target/linux/ath79/dts/ar9342_ubnt_nanostation-ac.dts

@@ -10,6 +10,12 @@
 	compatible = "ubnt,nanostation-ac","ubnt,wa", "qca,ar9342";
 	model = "Ubiquiti Nanostation AC (WA)";
 
+	aliases {
+		led-boot = &led_rssi3;
+		led-failsafe = &led_rssi3;
+		led-upgrade = &led_rssi3;
+	};
+
 	leds {
 		compatible = "gpio-leds";
 
@@ -28,7 +34,7 @@
 			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
 		};
 
-		rssi3 {
+		led_rssi3: rssi3 {
 			label = "ubnt:blue:rssi3";
 			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
 		};