common/cpt: fix null auth only
common/cpt: fix null auth only

Fixes: 351fbee21986 ("common/cpt: support hash")
Cc: stable@dpdk.org

Signed-off-by: Anoob Joseph <3ccb4777bd2856f4d9127f25efe6455b1a791ba2@marvell.com>
Signed-off-by: Tejasree Kondoj <bed1b2e7540700754a417e562dc218179ce5788a@marvell.com>

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