bnxt_en: Properly remove port parameter support

This driver doesn't have any port parameters and registers
devlink port parameters with empty table. Remove the useless
calls to devlink_port_params_register and _unregister.

Fixes: da203dfa

 ("Revert "devlink: Add a generic wake_on_lan port parameter"")
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>