sparc: use for_each_child_of_node() macro

Use for_each_child_of_node() macro instead of open coding it.

Signed-off-by: Qinglang Miao <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

arch/sparc/kernel/pci.c

···
 		pci_info(bus, "scan_bus[%pOF] bus no %d\n",
 			 node, bus->number);
 
-	child = NULL;
 	prev_devfn = -1;
-	while ((child = of_get_next_child(node, child)) != NULL) {
+	for_each_child_of_node(node, child) {
 		if (ofpci_verbose)
 			pci_info(bus, "  * %pOF\n", child);
 		reg = of_get_property(child, "reg", &reglen);