V4L/DVB (12990): gspca - m5602-ov7660: Don't set blue and red gain during init

Don't set blue and red gain during init as we manuall set it later

Signed-off-by: Erik Andrén <erik.andren@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>