iommu/amd: Remap the IOMMU device table with the memory encryption mask for kdump

The kdump kernel copies the IOMMU device table from the old device table
which is encrypted when SME is enabled in the first kernel. So remap the
old device table with the memory encryption mask in the kdump kernel.

 [ bp: Massage commit message. ]

Signed-off-by: Lianbo Jiang <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Tom Lendacky <[email protected]>
Acked-by: Joerg Roedel <[email protected]>
Cc: [email protected]
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Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
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Link: https://lkml.kernel.org/r/[email protected]

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