crypto: hisilicon/zip - some misc cleanup

mainline inclusion
from mainline-v6.1-rc1
commit 6d9a8995
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5T7AD
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6d9a899557c8751372da99d137eaaa9cdbe81f41



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Some cleanup for code:
1. Change names for easy to understand.
2. Unify the variables type.
3. Use the right return value.

Signed-off-by: Yang Shen <shenyang39@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jiangshui Yang <yangjiangshui@h-partners.com>
Reviewed-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Reviewed-by: Yang Shen <shenyang39@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>