app/testpmd: fix port parsing in show port info command
app/testpmd: fix port parsing in show port info command

The port number type should be consistent with librte_cmdline,
else there is potential endian issue.

Signed-off-by: Xuelin Shi <70182c0027b8c84bfec5b780edd45fe2361d9c33@freescale.com>
Acked-by: Olivier Matz <dfcc1510895413197abb4336e39bb0a3906cba71@6wind.com>

phermansson/dpdk,phermansson/dpdk,phermansson/dpdk,phermansson/dpdk