vfio/migration: bugfix lost interruption after live migration

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7BTMW


CVE: NA

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During repeated live migration. There may be a problem with missing
interrupts. In this case, re-send the doorbell on the migration end.
Let QM report an interrupt again, and migrate the interrupt to the
destination together.
Thereby preventing the problem of interrupt loss.

fixec: a0464f0b ("vfio/hisilicon: add acc live migration driver")
Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Signed-off-by: JiangShui Yang <yangjiangshui@h-partners.com>