net/mlx5: Fix tainted pointer delete is case of flow rules creation fail

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: Fix tainted pointer delete is case of flow rules creation fail

In case of flow rule creation fail in mlx5_lag_create_port_sel_table(),

instead of previously created rules, the tainted pointer is deleted

deveral times.

Fix this bug by using correct flow rules pointers.

Found by Linux Verification Center (linuxtesting.org) with SVACE.