V4L/DVB (11915): af9015: support for Genius TVGo DVB-T03

Add USB ID (0458:4012) for Genius TVGo DVB-T03.
Thanks to Petr Vodicka <vodicka.petr@email.cz> for reporting and testing.

Tested-by: Petr Vodicka <vodicka.petr@email.cz>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>