USB: unusual dev for Option N.V. ZeroCD modems

Many newer Option mobile broadband devices initially provide a
usb-storage "driver CD" device that's pretty useless on Linux since
any software on it most likely wouldn't be compatible with your
kernel or distro anyway.  Thus, by default just kill the driver
CD device by sending the SCSI 'rezero' command, but allow override
of the default behavior via usb-storage module parameter so users
can keep the ZeroCD device if they really want to.  Inspired by
the Sierra TruInstall patch.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Cc: Peter Henn <p.henn@option.com
Cc: Denis Joseph Barrow <D.Barow@option.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>