[media] si2168: add own goto label for kzalloc failure

Use own label for kzalloc failure in which does not call kfree().
kfree() could be called with NULL, but it is still better to have
own label which skips unnecessary kfree().
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/dvb-frontends/si2168.c

@@ -672,7 +672,7 @@ static int si2168_probe(struct i2c_client *client,
 	if (!dev) {
 		ret = -ENOMEM;
 		dev_err(&client->dev, "kzalloc() failed\n");
-		goto err_kfree;
+		goto err;
 	}
 
 	mutex_init(&dev->i2c_mutex);
@@ -700,6 +700,7 @@ static int si2168_probe(struct i2c_client *client,
 	return 0;
 err_kfree:
 	kfree(dev);
+err:
 	dev_dbg(&client->dev, "failed=%d\n", ret);
 	return ret;
 }