iommu: Stop tracking the dirty log status of iommu_domain

virt inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4WK5B


CVE: NA

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The iommu_domain may contain more than one DMA range which can
be dirty log tracked separately, so it's hard to track the dirty
log status of iommu_domain. The upper layer (e.g. vfio) should
make sure it's doing right thing.

Fixes: bbf3b39e (iommu: Introduce dirty log tracking framework)
Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Tested-by: Kunkun Jiang <jiangkunkun@huawei.com>
Reviewed-by: Kunkun Jiang <jiangkunkun@huawei.com>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>