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 <taox.zhu@intel.com>
Reviewed-by: Qi Zhang <qi.z.zhang@intel.com>