[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>

arch/powerpc/platforms/maple/pci.c

@@ -558,7 +558,7 @@ void __init maple_pci_init(void)
 	 * safe assumptions hopefully.
 	 */
 	if (u3_agp) {
-		struct device_node *np = u3_agp->arch_data;
+		struct device_node *np = u3_agp->dn;
 		PCI_DN(np)->busno = 0xf0;
 		for (np = np->child; np; np = np->sibling)
 			PCI_DN(np)->busno = 0xf0;