iommu/vt-d: Drop duplicate check in dma_pte_free_pagetable()
The BUG_ON check exists in dma_pte_clear_range(), kill the duplicate check. Signed-off-by: NKefeng Wang <wangkefeng.wang@huawei.com> Link: https://lore.kernel.org/r/20211025032307.182974-1-wangkefeng.wang@huawei.comSigned-off-by: NLu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/20211217083817.1745419-3-baolu.lu@linux.intel.comSigned-off-by: NJoerg Roedel <jroedel@suse.de>
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