RDMA/mlx5: Fix unwind flow as part of mlx5_ib_stage_init_init

Fix unwind flow as part of mlx5_ib_stage_init_init to use the correct
goto upon an error.

Fixes: 758ce14a

 ("RDMA/mlx5: Implement MACsec gid addition and deletion")
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Reviewed-by: Patrisious Haddad <phaddad@nvidia.com>
Link: https://lore.kernel.org/r/aa40615116eda14ec9eca21d52017d632ea89188.1716900410.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>