powerpc/pseries: Fix PCI config address for DDW

[Michael Ellerman]

On Wed, 2016-25-05 at 23:56:07 UTC, Gavin Shan wrote:
> In commit <8445a87f7092> ("powerpc/iommu: Remove the dependency
> on EEH struct in DDW mechanism"), the PE address was replaced
> with the PCI config address in order to remove dependency on EEH.
> According to PAPR spec, firmware (pHyp or QEMU) should accept
> "xxBBSSxx" format PCI config address, not "xxxxBBSS" provided
> by the patch. Note that "BB" is PCI bus number and "SS" is the
> combination of slot and function number.
> 
> This fixes the PCI address passed to DDW RTAS calls.
> 
> Fixes: 8445a87f7092 ("powerpc/iommu: Remove the dependency on EEH struct in DDW mechanism")

That commit was Cc'ed to stable, so this needs to be also.

I've added it here.

cheers