rockchip: gpio: convert to livetree

Update the Rockchip GPIO-bank driver to support a live 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>

Version-changes: 2
- use the dev_read_addr_ptr function in rk_gpio.c

drivers/gpio/rk_gpio.c

@@ -104,7 +104,7 @@ static int rockchip_gpio_probe(struct udevice *dev)
 	int ret;
 
 	/* This only supports RK3288 at present */
-	priv->regs = (struct rockchip_gpio_regs *)devfdt_get_addr(dev);
+	priv->regs = dev_read_addr_ptr(dev);
 	ret = uclass_first_device_err(UCLASS_PINCTRL, &priv->pinctrl);
 	if (ret)
 		return ret;