USB: option: add support for Telit LE920

commit 03eb466f276ceef9dcf023dc5474db02af68aad9 upstream.

Add PID and special handling for Telit LE920

Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>