[media] r820t: do not double-free fe->tuner_priv in r820t_release()

fe->tuner_priv is already freed by hybrid_tuner_release_state().
Signed-off-by: Gianluca Gennari <gennarone@gmail.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/tuners/r820t.c

@@ -2256,7 +2256,6 @@ static int r820t_release(struct dvb_frontend *fe)
 
 	mutex_unlock(&r820t_list_mutex);
 
-	kfree(fe->tuner_priv);
 	fe->tuner_priv = NULL;
 
 	return 0;