[media] saa7164: Remove V4L2_CAP_STREAMING capability flag

Remove V4L2_CAP_STREAMING capability flag, we don't support
the ioctls. It breaks VLC otherwise.

Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>