net/mlx5e: Remove TLS-specific logic in generic create TIS API

TLS TISes are created using their own dedicated functions,
don't honor their specific logic here.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>