[POWERPC] Merge ppc32 and ppc64 pcibios_alloc_controller() prototypes

Make the ppc32 pcibios_alloc_controller take a device node to match
the ppc64 prototypes and have it set arch_data.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index 56deb31..df3251c 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -610,7 +610,7 @@
 static int next_controller_index;
 
 struct pci_controller * __init
-pcibios_alloc_controller(void)
+pcibios_alloc_controller(struct device_node *dev)
 {
 	struct pci_controller *hose;
 
@@ -621,6 +621,7 @@
 	hose_tail = &hose->next;
 
 	hose->global_number = next_controller_index++;
+	hose->arch_data = dev;
 
 	return hose;
 }