net: hns3: use pause capability queried from firmware

mainline inclusion
from mainline-v5.13-rc1
commit e8194f32
category: feature
bugzilla: 173966
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e8194f3262055bc2e6e2b7c02f9de2c3d2ef7fc9



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

For maintainability and compatibility, add support to use pause
capability queried from firmware, and add debugfs support to dump
this capability.

Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Yongxin Li <liyongxin1@huawei.com>
Signed-off-by: Junxin Chen <chenjunxin1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>