[PARISC] Clean up compiler warning in pci.c

Avoid compiler warning for unused variables on 32bit kernels by
conditionalizing the local variables on CONFIG_64BIT. PCI_HOST_ADDR()
only uses the hba argument on 64bit compiles.
Signed-off-by: Helge Deller <deller@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

arch/parisc/kernel/pci.c

@@ -258,8 +258,10 @@ void __devinit pcibios_resource_to_bus(struct pci_dev *dev,
 void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
 			      struct pci_bus_region *region)
 {
+#ifdef CONFIG_64BIT
 	struct pci_bus *bus = dev->bus;
 	struct pci_hba_data *hba = HBA_DATA(bus->bridge->platform_data);
+#endif
 
 	if (res->flags & IORESOURCE_MEM) {
 		res->start = PCI_HOST_ADDR(hba, region->start);