2 small fixes for pen support

1. Set the id.vendor field for the pen input_dev
2. Fix a typo in a comment
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211212124242.81019-5-hdegoede@redhat.comSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>