V4L/DVB (9680): gspca: Let gspca handle the webcam 0c45:613a instead of sn9c102.

The driver sn9c102 has no code for the ov7648 sensor.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>