of/address: merge of_address_to_resource()

Merge common code between PowerPC and Microblaze.  This patch also
moves the prototype of pci_address_to_pio() out of pci-bridge.h and
into prom.h because the only user of pci_address_to_pio() is
of_address_to_resource().

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Michal Simek <monstr@monstr.eu>
CC: Stephen Rothwell <sfr@canb.auug.org.au>

diff --git a/include/linux/of_address.h b/include/linux/of_address.h
index 570831d..474b794 100644
--- a/include/linux/of_address.h
+++ b/include/linux/of_address.h
@@ -3,6 +3,11 @@
 #include <linux/ioport.h>
 #include <linux/of.h>
 
+extern int __of_address_to_resource(struct device_node *dev, const u32 *addrp,
+				    u64 size, unsigned int flags,
+				    struct resource *r);
+extern int of_address_to_resource(struct device_node *dev, int index,
+				  struct resource *r);
 extern void __iomem *of_iomap(struct device_node *device, int index);
 
 #endif /* __OF_ADDRESS_H */