KVM: arm64: vgic-its: Flush pending LPIs when nuking DT

virt inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4IZPY


CVE: NA

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Pending LPIs may block new allocated LPIs in kdump secondary kernel.
We only do that for guest kernel access to limit the change impact.

Signed-off-by: Heyi Guo <guoheyi@huawei.com>
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Hailiang Zhang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://gitee.com/openeuler/kernel/commit/5b574685b743


Reviewed-by: Yanan Wang <wangyanan55@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>