net: hns3: add enabled tc numbers and dwrr weight info in debugfs

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

Sometimes we want to see the actual tc numbers that enabled and
want to see the dwrr weight of each tc, so adds these information
to debugfs.

Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Zhong Zhaohui <zhongzhaohui@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>