crypto:hisilicon/qm - cache write back before flr and poweroff

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4YKIJ


CVE: NA

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In order to prevent an error when the hardware writes back cache, the
driver should write back the hardware cache before flr and poweroff.
If vfs is enabled, we should process abnormal scenes of the whole vfs.

Signed-off-by: Yu'an Wang <wangyuan46@huawei.com>
Reviewed-by: Weili Qian <qianweili@huawei.com>
Reviewed-by: Ling Mingqiang <lingmingqiang@huawei.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>