USB: Obscure Maxon BP3-USB Device Support 16d8:6280 for option driver

The modem was detected, the ttyUSB{0,1,2} appeared, a call could be
made, and the expected data rate was achieved.  Tested for an hour or
two, total of 100Mb.  I shall do more testing.

Signed-off-by: James Cameron <quozl@laptop.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>