[PATCH] PCI Hotplug/powerpc: module build break

The RPAPHP hoplug driver will not build as a module, because it calls
on a pcibios routine which is not exported. This exports the symbol.
Problem reported by Olaf Hering <olh@suse.de>

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index ba21a6c..24fe70f 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -271,6 +271,9 @@
 	list_for_each_entry(child_bus, &b->children, node)
 		pcibios_claim_one_bus(child_bus);
 }
+#ifdef CONFIG_HOTPLUG
+EXPORT_SYMBOL_GPL(pcibios_claim_one_bus);
+#endif
 
 #ifndef CONFIG_PPC_ISERIES
 static void __init pcibios_claim_of_setup(void)