usb: option: blacklist ZTE MF667 net interface

commit 3635c7e2d59f7861afa6fa5e87e2a58860ff514d upstream.

Interface #5 of 19d2:1270 is a net interface which has been submitted to the
qmi_wwan driver so consequently remove it from the option driver.

Signed-off-by: Raymond Wanyoike <raymond.wanyoike@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>