net: hns: update hns version to 21.2.1

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

-----------------------------

This patch update hns version to 21.2.1 and make driver version
the same as module version.

Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Reviewed-by: li yongxin <liyongxin1@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Cheng Jian <cj.chengjian@huawei.com>