RDMA/hns: Use hr_reg_read() instead of remaining roce_get_xxx()

mainline inclusion
from mainline-for-linus
commit 813c9802
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5CHIG
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git/commit/?id=813c980294d48362ead5422b056072ed214ca2bf

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To reduce the code size and make the code clearer, replace all
roce_get_xxx() with hr_reg_read() to read the data fields.

Link: https://lore.kernel.org/r/20220512080012.38728-3-liangwenpeng@huawei.com


Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Zhengfeng Luo <luozhengfeng@h-partners.com>
Reviewed-by: Yangyang Li <liyangyang20@huawei.com>
Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>