[EXT] [PATCH v2] app/test-crypto-perf: fix invalid mbuf next operation

[Akhil Goyal]

> In fill_multi_seg_mbuf(), when remaining_segments is 0,
> rte_mbuf m's next should pointer to NULL instead of a
> new rte_mbuf, that causes setting m->next as NULL out
> of the while loop to the invalid mbuf.
> 
> This commit fixes the invalid mbuf next operation.
> 
> Fixes: bf9d6702eca9 ("app/crypto-perf: use single mempool")
> 
> Signed-off-by: Suanming Mou <suanmingm at nvidia.com>
Cc: stable at dpdk.org
Applied to dpdk-next-crypto
Thanks.