[media] gspca - sonixj: Add horizontal and vertical flip for po2030n

The PO2030N sensor chip found in hama AC-150 webcam supports horizontal
and vertical flipping the image by hardware.

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