RDMA/hns: Kernel notify usr space to stop ring db

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6F3ZU



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In the reset scenario, if the kernel receives the reset signal,
it needs to notify the user space to stop ring doorbell.

Signed-off-by: Yixing Liu <liuyixing1@huawei.com>
Signed-off-by: Guofeng Yue <yueguofeng@hisilicon.com>
Reviewed-by: Yangyang Li <liyangyang20@huawei.com>
Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>