RDMA/hns: Simplify function's resource related command

mainline inclusion
from mainline-v5.12-rc1
commit 0fb46da0
category: feature
bugzilla: 174002
CVE:NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0fb46da051aec3c143e41adc321f3c8a7506d19c

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Use hr_reg_write/read() to simplify codes about configuring function's
resource. And because the design of PF/VF fields is same, they can be
defined only once.

Link: https://lore.kernel.org/r/1617715514-29039-2-git-send-email-liweihang@huawei.com


Signed-off-by: Xi Wang <wangxi11@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: wangsirong <wangsirong@huawei.com>
Reviewed-by: ChunZhi Hu <huchunzhi@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>