[media] af9035: add USB id for 07ca:a867

New USB id for the Avermedia A867 stick (Sky Digital Key with blue led).

Signed-off-by: Gianluca Gennari <gennarone@gmail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>