app/testpmd: fix build for 16-byte Rx descriptor mode
app/testpmd: fix build for 16-byte Rx descriptor mode

This minor patch fixes unused variable ‘ret’ compile error When
CONFIG_RTE_LIBRTE_I40E_16BYTE_RX_DESC was selected.

Fixes: 6f51deb903b2 ("app/testpmd: check status of getting ethdev info")

Signed-off-by: Tao Zhu <98fc9452bad001bbed4b53169990d94b082d6178@intel.com>
Reviewed-by: Qi Zhang <9e9e58ffa71a29bb7b87766b362515be648fcbe0@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk