Fix RUTX support

root/target/linux/ipq40xx/base-files/bin/board_track

@@ -0,0 +1,36 @@
+#!/bin/sh
+
+. /lib/functions/uci-defaults.sh
+
+CFG=/etc/board.json
+SLP=30
+
+check_modem() {
+	json_select "$2"
+	json_get_vars id
+
+	[ -z "$id" ] && {
+		json_select ..
+		return 0
+	}
+
+	ttys=$(ls -d /sys/bus/usb/devices/$id/${id}*/tty?*)
+
+	[ -n "$ttys" ] || { #FAILED TO FIND MODEM
+		mctl -s
+		sleep 1
+		mctl -p
+		json_select ..
+		return 1
+	}
+
+	#MODEM UP
+	json_select ..
+}
+
+board_config_update
+while true; do
+	json_for_each_item check_modem modems
+	sleep $SLP
+	[ $SLP -lt 300 ] && SLP=$((SLP+30))
+done