[POWERPC] pci_controller->arch_data really is a struct device_node *

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_ds.c b/arch/powerpc/platforms/85xx/mpc85xx_ds.c
index 59c121a..bdb3d0b 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_ds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_ds.c
@@ -123,7 +123,7 @@
 	struct device_node* node;
 	struct resource rsrc;
 
-	node = (struct device_node *)hose->arch_data;
+	node = hose->dn;
 	of_address_to_resource(node, 0, &rsrc);
 
 	if ((rsrc.start & 0xfffff) == primary_phb_addr) {