powerpc: Move iSeries_iommu.c to powerpc/platforms/iseries

And rename it to iommu.c
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

arch/powerpc/platforms/iseries/Makefile

 obj-y += hvlog.o hvlpconfig.o lpardata.o setup.o mf.o lpevents.o \
-	hvcall.o proc.o htab.o
+	hvcall.o proc.o htab.o iommu.o

arch/ppc64/kernel/iSeries_iommu.c → arch/powerpc/platforms/iseries/iommu.c

 /*
- * arch/ppc64/kernel/iSeries_iommu.c
- *
  * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
  *
  * Rewrite, cleanup:

arch/ppc64/kernel/Makefile

@@ -22,8 +22,6 @@ pci-obj-$(CONFIG_PPC_MULTIPLATFORM)	+= pci_dn.o pci_direct_iommu.o
 
 obj-$(CONFIG_PCI)	+= pci.o pci_iommu.o iomap.o $(pci-obj-y)
 
-obj-$(CONFIG_PPC_ISERIES) += iSeries_iommu.o
-
 obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram.o i8259.o prom_init.o
 
 obj-$(CONFIG_PPC_PSERIES) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o \