app/testpmd: fix Tx metadata show command

app/testpmd: fix Tx metadata show command

Function cmd_config_tx_metadata_specific_parsed() takes input value,
applies rte_cpu_to_be_32() on it, and stores it for Tx use.
Function cmd_show_tx_metadata_parsed() displays the stored value as is.

This patch modifies function cmd_show_tx_metadata_parsed(), to apply
rte_be_to_cpu_32() on the stored value before displaying it.

Fixes: c18feafa193c ("app/testpmd: support metadata as flow rule item")
Cc: stable@dpdk.org
Signed-off-by: Dekel Peled <dekelp@mellanox.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>