With the inclusion of Omni 56K Plus, this driver seem to be more common
among the family of Zyxel omni modem. Update the driver and module
descriptions.
Signed-off-by: NAlexandre GRIVEAUX <agriveaux@deutnet.info>
[ johan: amend commit message ]
Signed-off-by: NJohan Hovold <johan@kernel.org>