WD_HPRE: code review fix of round 8 and round 9

driver inclusion
category:bugfix
bugzilla:NA
CVE:NA

Code review fix of round 8 and round 9 for hpre_crypto.c

Feature or Bugfix: Bugfix

Signed-off-by: yekai (A) <yekai13@huawei.com>
Reviewed-by: xuzaibo <xuzaibo@huawei.com>
Signed-off-by: Hui Tang <tanghui20@huawei.com>
Reviewed-by: Zhou Wang <wangzhou1@hisilicon.com>
Reviewed-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>