V4L/DVB (11871): gspca - spca561: Change the Rev12a controls.

- Extend the gain range
- Adjust the exposure
- Remove the broken autogain

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