net/cxgbe: fix control queue mbuf pool naming convention

net/cxgbe: fix control queue mbuf pool naming convention

When multiple Chelsio adapters are present, the current naming
convention of using underlying physical port number of the adapter
creates conflicts when allocating control queue mbuf pool for
multiple adapters and hence results in allocation failure. Fix by
using port_id from rte_eth_dev_data, instead of physical port number.

Fixes: 3a3aaabc7c77 ("net/cxgbe: add control queue to communicate filter requests")
Cc: stable@dpdk.org
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>