plat-orion: share PCIe handling code

Split off Orion PCIe handling code into plat-orion/.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Reviewed-by: Tzachi Perelstein <tzachi@marvell.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
diff --git a/arch/arm/mach-orion/common.h b/arch/arm/mach-orion/common.h
index b676be0..9a5afef 100644
--- a/arch/arm/mach-orion/common.h
+++ b/arch/arm/mach-orion/common.h
@@ -43,8 +43,8 @@
 struct pci_bus;
 
 void orion_pcie_id(u32 *dev, u32 *rev);
-u32 orion_pcie_local_bus_nr(void);
-u32 orion_pci_local_bus_nr(void);
+int orion_pcie_local_bus_nr(void);
+int orion_pci_local_bus_nr(void);
 int orion_pci_sys_setup(int nr, struct pci_sys_data *sys);
 struct pci_bus *orion_pci_sys_scan_bus(int nr, struct pci_sys_data *sys);