rockchip: mmc: convert to livetree

Update the Rockchip-specific wrapper for the Designware 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>

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

drivers/mmc/rockchip_dw_mmc.c

@@ -58,7 +58,7 @@ static int rockchip_dwmmc_ofdata_to_platdata(struct udevice *dev)
 	struct dwmci_host *host = &priv->host;
 
 	host->name = dev->name;
-	host->ioaddr = (void *)devfdt_get_addr(dev);
+	host->ioaddr = dev_read_addr_ptr(dev);
 	host->buswidth = dev_read_u32_default(dev, "bus-width", 4);
 	host->get_mmc_clk = rockchip_dwmmc_get_mmc_clk;
 	host->priv = dev;