RDMA/hns: Support query HW ID from user space.

driver inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8C2IP



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This patch supports users to query HW ID. The driver will obtain
the HW ID from the firmware during initialization. The user-mode
driver can request the kernel-mode driver to read this information
through the query_device_ex().

Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>