package/busybox: enable ttyUSB[0-9] when using mdev

Some of our systems are using ttyUSB0 devices as a serial console.
Add them to mdev.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/busybox/mdev.conf

@@ -20,6 +20,7 @@ tty		root:tty 666
 tty[0-9]*	root:tty 660
 vcsa*[0-9]*	root:tty 660
 ttyS[0-9]*	root:root 660
+ttyUSB[0-9]*	root:root 660
 
 # alsa sound devices
 pcm.*		root:audio 660 =snd/