net: hns3: fix a memory leak issue for hclge_map_unmap_ring_to_vf_vector

When hclge_bind_ring_with_vector() fails,
hclge_map_unmap_ring_to_vf_vector() returns the error
directly, so nobody will free the memory allocated by
hclge_get_ring_chain_from_mbx().

So hclge_free_vector_ring_chain() should be called no matter
hclge_bind_ring_with_vector() fails or not.

Fixes: 84e095d6 ("net: hns3: Change PF to add ring-vect binding & resetQ to mailbox")
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c

@@ -192,12 +192,10 @@ static int hclge_map_unmap_ring_to_vf_vector(struct hclge_vport *vport, bool en,
 		return ret;
 
 	ret = hclge_bind_ring_with_vector(vport, vector_id, en, &ring_chain);
-	if (ret)
-		return ret;
 
 	hclge_free_vector_ring_chain(&ring_chain);
 
-	return 0;
+	return ret;
 }
 
 static int hclge_set_vf_promisc_mode(struct hclge_vport *vport,