[SPARC64]: Export pcibios_resource_to_bus().

SYM2 driver uses it.
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc64/kernel/pci.c

@@ -419,6 +419,7 @@ void pcibios_resource_to_bus(struct pci_dev *pdev, struct pci_bus_region *region
 	region->start = res->start - zero_res.start;
 	region->end = res->end - zero_res.start;
 }
+EXPORT_SYMBOL(pcibios_resource_to_bus);
 
 void pcibios_bus_to_resource(struct pci_dev *pdev, struct resource *res,
 			     struct pci_bus_region *region)