Add support for Siemens SX1 mobile phone;
add support for USB-based console
(enable with "setenv stdout usbtty; setenv stdin usbtty")
diff --git a/common/devices.c b/common/devices.c
index bf7486a..aa05533 100644
--- a/common/devices.c
+++ b/common/devices.c
@@ -194,6 +194,9 @@
 	drv_logbuff_init ();
 #endif
 	drv_system_init ();
+#ifdef CONFIG_USB_TTY
+	drv_usbtty_init ();
+#endif
 
 	return (0);
 }