V4L/DVB (11941): gspca - m5602-ov9650: Add vflip quirk for the ASUS A6VA

Add vflip quirk for the ASUS A6VA. Thanks to Salvo Di Rosa for reporting.

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