rte_mem_virt2iova() function returns RTE_BAD_IOVA on failure, not zero.
Fixes: 62196f4e0941 ("mem: rename address mapping function to IOVA")
Cc: stable@dpdk.org
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>