V4L/DVB (5376): Add dependency on VIDEO_V4L1

VIDEO_V4L1 is needed to get tvaudio to be built. Stupid really as ivtv is only
using the v4l2 API to communicate with tvaudio.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>