[media] r820t: memory leak in release()

I've moved the kfree(fe->tuner_priv) one line earlier, otherwise it is
a no-op.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/tuners/r820t.c b/drivers/media/tuners/r820t.c
index ba033fd..36ddbf1 100644
--- a/drivers/media/tuners/r820t.c
+++ b/drivers/media/tuners/r820t.c
@@ -2252,9 +2252,8 @@
 
 	mutex_unlock(&r820t_list_mutex);
 
-	fe->tuner_priv = NULL;
-
 	kfree(fe->tuner_priv);
+	fe->tuner_priv = NULL;
 
 	return 0;
 }