net/mlx5: Reduce useless indirection in IPsec FS add/delete flows

There is no need in one-liners wrappers to call internal functions.
Let's remove them.

Reviewed-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>