V4L/DVB (13891): gspca - vc032x: Fix bad probe of the sensor mi1320.

- have 2 tables for sensor probe
- with the same ID, the sensor mi1320 is found with the bridge vc0321,
        the sensor mi1320_soc with the bridge vc0323
- add some comments

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