powerpc/pseries/eeh: Use for_each_pci_dev()

Use for_each_pci_dev() to simplify the code.
Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/pseries/eeh_cache.c

@@ -288,8 +288,7 @@ void __init pci_addr_cache_build(void)
 
 	spin_lock_init(&pci_io_addr_cache_root.piar_lock);
 
-	while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
-
+	for_each_pci_dev(dev) {
 		pci_addr_cache_insert_device(dev);
 
 		dn = pci_device_to_OF_node(dev);