net/mlx5: unlock on error path in esw_vfs_changed_event_handler()

Unlock before returning on this error path.

Fixes: f1bc646c ("net/mlx5: Use devl_ API in mlx5_esw_offloads_devlink_port_register")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

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

@@ -3116,8 +3116,10 @@ esw_vfs_changed_event_handler(struct mlx5_eswitch *esw, const u32 *out)
 
 		err = mlx5_eswitch_load_vf_vports(esw, new_num_vfs,
 						  MLX5_VPORT_UC_ADDR_CHANGE);
-		if (err)
+		if (err) {
+			devl_unlock(devlink);
 			return;
+		}
 	}
 	esw->esw_funcs.num_vfs = new_num_vfs;
 	devl_unlock(devlink);