net/mlx5: potential error pointer dereference in error handling

The error handling was a bit flipped around.  If the mlx5_create_flow_group()
function failed then it would have resulted in dereferencing "fg" when
it was an error pointer.

Fixes: 80f09dfc ("net/mlx5: Eswitch, enable RoCE loopback traffic")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/rdma.c

@@ -106,10 +106,10 @@ static int mlx5_rdma_enable_roce_steering(struct mlx5_core_dev *dev)
 
 	return 0;
 
-destroy_flow_table:
-	mlx5_destroy_flow_table(ft);
 destroy_flow_group:
 	mlx5_destroy_flow_group(fg);
+destroy_flow_table:
+	mlx5_destroy_flow_table(ft);
 free:
 	kvfree(spec);
 	kvfree(flow_group_in);