[media] gspca - spca1528: Change the JPEG quality of the images

The JPEG quality was guessed as around 82%. Information in ms-win drivers
says it should be 85%.

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