[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/86xx/mpc86xx_hpcn.c b/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c
index 32a531a..14f4e52 100644
--- a/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c
+++ b/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c
@@ -116,7 +116,7 @@
 	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) == 0x8000) {