[no-ci] Update 4G modem files (#1392)

Co-authored-by: Igor Zalatov (from Citadel PC) <flyrouter@gmail.com>

general/overlay/etc/init.d/S40network

@@ -10,6 +10,7 @@ set_wireless() {
 		ifup wlan0
 	elif $path/modem "$dev"; then
 		ifup usb0
+		ifup eth1
 	fi
 	[ -e /sys/class/net/eth0 ] && ifconfig eth0 "${net:-192.168.2.10}"
 }
@@ -31,6 +32,7 @@ case "$1" in
 		if [ -n "$dev" ]; then
 			ifdown -f wlan0
 			ifdown -f usb0
+			ifdown -f eth1
 		else
 			ifdown eth0
 		fi

general/overlay/etc/network/interfaces.d/eth1

@@ -0,0 +1 @@
+iface eth1 inet dhcp

general/overlay/etc/wireless/modem

@@ -8,7 +8,15 @@ set_gpio() {
 # Generic RNDIS
 if [ "$1" = "rndis-generic" ]; then
 	modprobe rndis_host
-	sleep 10
+	sleep 5
+	exit 0
+fi
+
+# Huawei E3372H and eth1
+if [ "$1" = "rndis-e3372h" ]; then
+	usb_modeswitch -v 0x12d1 -p 0x1f01 -c /usr/share/usb_modeswitch/12d1:1f0
+	modprobe rndis_host
+	sleep 5
 	exit 0
 fi