powerpc/pseries: Drop always true CONFIG_PSERIES_MSI

Now that pseries selects PCI_MSI && PCI, EEH will always be true, and
therefore CONFIG_PSERIES_MSI will always be true. So drop it, and move
msi.o to obj-y.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/platforms/pseries/Kconfig

@@ -43,11 +43,6 @@ config DTL
 
 	  Say N if you are unsure.
 
-config PSERIES_MSI
-       bool
-       depends on PCI_MSI && PPC_PSERIES && EEH
-       default y
-
 config PSERIES_ENERGY
 	tristate "pSeries energy management capabilities driver"
 	depends on PPC_PSERIES

arch/powerpc/platforms/pseries/Makefile

@@ -5,11 +5,10 @@ obj-y			:= lpar.o hvCall.o nvram.o reconfig.o \
 			   of_helpers.o \
 			   setup.o iommu.o event_sources.o ras.o \
 			   firmware.o power.o dlpar.o mobility.o rng.o \
-			   pci.o pci_dlpar.o eeh_pseries.o
+			   pci.o pci_dlpar.o eeh_pseries.o msi.o
 obj-$(CONFIG_SMP)	+= smp.o
 obj-$(CONFIG_SCANLOG)	+= scanlog.o
 obj-$(CONFIG_KEXEC)	+= kexec.o
-obj-$(CONFIG_PSERIES_MSI)	+= msi.o
 obj-$(CONFIG_PSERIES_ENERGY)	+= pseries_energy.o
 
 obj-$(CONFIG_HOTPLUG_CPU)	+= hotplug-cpu.o