[media] dvb: get rid of fe_ioctl_override callback

This callback were meant to allow overriding a FE callback, before its
call, but it is not really needed, as the callback can be intercepted
after tuner attachment.

Worse than that, only DVBv3 calls are intercepted this way, so a DVBv5
application will produce different effects than a DVBv3 one.

So, get rid of it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Antti Palosaari <crope@iki.fi>
Reviewed-by: Antti Palosaari <crope@iki.fi>

include/media/videobuf-dvb.h

@@ -45,9 +45,7 @@ int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f,
 			  void *adapter_priv,
 			  struct device *device,
 			  short *adapter_nr,
-			  int mfe_shared,
-			  int (*fe_ioctl_override)(struct dvb_frontend *,
-					unsigned int, void *, unsigned int));
+			  int mfe_shared);
 
 void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f);