PCI: Change pci_bus_region addresses to dma_addr_t

Struct pci_bus_region contains bus addresses, which are type dma_addr_t,
not resource_size_t.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

include/linux/pci.h

@@ -551,8 +551,8 @@ int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
 		  int reg, int len, u32 val);
 
 struct pci_bus_region {
-	resource_size_t start;
-	resource_size_t end;
+	dma_addr_t start;
+	dma_addr_t end;
 };
 
 struct pci_dynids {