roh/hns3: Add ROH hns3 driver and register a ROH device

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



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These are the source code files for the Hisilicon
ROH driver for ARM, include:
1. hns3_roh_device instance initialization and
   uninitialization.
2. apply for a ROH device to register with the
   ROH core, deregister and release the ROH device
   from ROH Core.

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>
Reviewed-by: Jian Shen <shenjian15@huawei.com>