V4L/DVB (7067): fix autoserach in the Hauppauge NOVA-T 500

This patch fix autoserach in the Hauppauge NOVA-T 500.

Signed-off-by: Jose Alberto Reguero <jareguero@telefonica.net>
Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>