powerpc: Use for_each_node_by_type instead of open coding it

Use for_each_node_by_type instead of open coding it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index aebef13..eade1fd 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -278,7 +278,7 @@
 
 	DBG(" -> initialize_cache_info()\n");
 
-	for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) {
+	for_each_node_by_type(np, "cpu") {
 		num_cpus += 1;
 
 		/* We're assuming *all* of the CPUs have the same