hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I67QNJ
CVE: NA

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Export the state of a hotplug memory device, and driviers
can use this information to manipulate the hotplug memory
device.
Signed-off-by: NZhang Zekun <zhangzekun11@huawei.com>
Reviewed-by: NKefeng Wang <wangkefeng.wang@huawei.com>