rockchip: timer: Convert to livetree

Update the Rockchip timer driver to support a live device tree.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

drivers/timer/rockchip_timer.c

@@ -101,7 +101,9 @@ static int rockchip_clk_ofdata_to_platdata(struct udevice *dev)
 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
 	struct rockchip_timer_priv *priv = dev_get_priv(dev);
 
-	priv->timer = (struct rk_timer *)devfdt_get_addr(dev);
+	priv->timer = dev_read_addr_ptr(dev);
+	if (!priv->timer)
+		return -ENOENT;
 #endif
 
 	return 0;