Add USB ID (07ca:850a) and configuration hack for AverMedia AVerTV Volar
Black HD (A850) DVB-T USB stick.
Tested-by: NOlivier MENUEL <omenuel@laposte.net>
Tested-by: NThomas Renard <threnard@gmail.com>
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>