net/mlx5: E-Switch, Remove redundant check of eswitch manager cap

esw_vport_create_legacy_acl_tables bails out immediately for eswitch
manager, hence remove all the check of esw manager cap after.

Signed-off-by: Bodong Wang <bodong@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>