roh/hns3: Add support for roh dfx(debugfs)

driver inclusion
category: featur
bugzilla: https://gitee.com/openeuler/kernel/issues/I5WKYW



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This patch provides the basic dfx information query method of
ROH through the kernel debufs system.

Signed-off-by: Ke Chen <chenke54@huawei.com>
Reviewed-by: Gang Zhang <gang.zhang@huawei.com>
Reviewed-by: Yefeng Yan <yanyefeng@huawei.com>
Reviewed-by: Jingchao Dai <daijingchao1@huawei.com>