examples/packet_ordering: fix port configuration

examples/packet_ordering: fix port configuration

A global ethernet port configuration is assigned to local variable
because in this way the local variable may be updated as required. But
this local variable is not used as input of rte_eth_dev_configure() in
original implementation, and cause that fast mbuf free feature cannot
be enabled on port.

This patch use this local variable as input of rte_eth_dev_configure().

Fixes: 6833f919f56b ("examples/packet_ordering: convert to new ethdev offloads API")
Cc: stable@dpdk.org
Signed-off-by: Dapeng Yu <dapengx.yu@intel.com>
Acked-by: Reshma Pattan <reshma.pattan@intel.com>