RDMA/hns: Fix port active speed

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8HZAQ



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HW supports a variety of different speed, but the current speed
is fixed.

The real speed should be queried from ethernet.

Fixes: 9a443537 ("IB/hns: Add driver files for hns RoCE driver")
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>