nvme: register ns_id attributes as default sysfs groups

euleros/rtos inclusion
category: bugfix
bugzilla: NA

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We should be registering the ns_id attribute as default sysfs
attribute groups, otherwise we have a race condition between
the uevent and the attributes appearing in sysfs.

Signed-off-by: Wenchao Hao <haowenchao@huawei.com>
Reviewed-by: Yufen Yu <yuyufen@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Cheng Jian <cj.chengjian@huawei.com>