!475 Support congestion control algorithm parameter configuration

Merge Pull Request from: @stinft 
 
hns roce support 4 congestion control algorithms. Each algorihm
involves multiple parameters. This patch add port sysfs directory
for each algorithm, which allows users to modify the parameters
of these algorithms.
bugzilla：#I6J5O7 
 
Link:https://gitee.com/openeuler/kernel/pulls/475

 

Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Jialin Zhang <zhangjialin11@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>