x86/ioapic: add an interface for driver to sync hardware data into memory

hulk inclusion
category: bugfix
bugzilla: 20890, https://gitee.com/openeuler/kernel/issues/I5ZV1W



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The default interrupt trigger mode of Pci driver is Level, however,
some pci drivers want to change irq trigger mode to edge by writing
hardware register directly.
In current kernel, this kind of driver needs to sync entry data which
has already been reservd in memory.

This patch provides an interface for the driver to sync entry data in
memory.

Signed-off-by: Hongbo Yao <yaohongbo@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: Zhang Jianhua <chris.zjh@huawei.com>
Reviewed-by: Liao Chang <liaochang1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>