nozomi: fix detection (lp:425312)

Nozomi devices aren't quite ready when the ports show up, so
we have to keep trying to open the port for a few seconds and
eventually it'll succeed.  Should really be fixed in the driver
(ie, don't create the ttys until they can actually be used) but
whatever.

src/mm-errors.c

@@ -39,6 +39,7 @@ mm_serial_error_get_type (void)
             ENUM_ENTRY (MM_SERIAL_OPEN_FAILED,      "SerialOpenFailed"),
             ENUM_ENTRY (MM_SERIAL_SEND_FAILED,      "SerialSendfailed"),
             ENUM_ENTRY (MM_SERIAL_RESPONSE_TIMEOUT, "SerialResponseTimeout"),
+            ENUM_ENTRY (MM_SERIAL_OPEN_FAILED_NO_DEVICE, "SerialOpenFailedNoDevice"),
             { 0, 0, 0 }
         };