dm: simple-bus: Add support for livetree

Modify simple-bus to support livetree.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/core/simple-bus.c

@@ -33,8 +33,7 @@ static int simple_bus_post_bind(struct udevice *dev)
 	u32 cell[3];
 	int ret;
 
-	ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev), "ranges",
+	ret = dev_read_u32_array(dev, "ranges", cell, ARRAY_SIZE(cell));
-				   cell, ARRAY_SIZE(cell));
 	if (!ret) {
 		struct simple_bus_plat *plat = dev_get_uclass_platdata(dev);