[media] az6007: fix the I2C W+R logic

The test for I2C W+R will never be true. Fix it.

Acked-by: Antti Palosaari <crope@iki.fi>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>