V4L/DVB: gspca - pac7302/pac7311: Remove the unused page loading

There is only one page to load (page 3 for pac7302 and page 4 for pac7311).

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