P.A. Semi: "PR" KVM configure error after KVM changes for 4.12

Hi All,

After the first batch of KVM changes for 4.12 merge window I get the 
following error message if I want to configure the Linux kernel with KVM 
PR support on my P.A. Semi board.

warning: (KVM_BOOK3S_64) selects SPAPR_TCE_IOMMU which has unmet direct 
dependencies (IOMMU_SUPPORT && (PPC_POWERNV || PPC_PSERIES))

Did you change the system requirements for KVM? Does it only work on IBM 
pSeries machines now?

Before the changes, I successfully compiled the Git version of kernel 
4.12 with KVM PR support. I successfully tested it with Mac-on-Linux/KVM PR.

Cheers,

Christian