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

And rename it to vio.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 iommu.o
 obj-$(CONFIG_PCI) += pci.o irq.o vpdinfo.o
+obj-$(CONFIG_IBMVIO) += vio.o

arch/ppc64/kernel/Makefile

@@ -45,7 +45,6 @@ obj-$(CONFIG_BOOTX_TEXT)	+= btext.o
 obj-$(CONFIG_HVCS)		+= hvcserver.o
 
 vio-obj-$(CONFIG_PPC_PSERIES)	+= pSeries_vio.o
-vio-obj-$(CONFIG_PPC_ISERIES)	+= iSeries_vio.o
 obj-$(CONFIG_IBMVIO)		+= vio.o $(vio-obj-y)
 obj-$(CONFIG_XICS)		+= xics.o
 obj-$(CONFIG_MPIC)		+= mpic.o