watchdog: mpc8xxx_wdt: Use dev_remap_addr()

Use dev_remap_addr() to replace devfdt_remap_addr which supports both live
device tree and flat DT backends, avoiding direct dependency on
devfdt_* helpers.

No functional changes.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Stefan Roese <stefan.roese@mailbox.org>

drivers/watchdog/mpc8xxx_wdt.c

@@ -81,7 +81,7 @@ static int mpc8xxx_wdt_of_to_plat(struct udevice *dev)
 {
 	struct mpc8xxx_wdt_priv *priv = dev_get_priv(dev);
 
-	priv->base = (void __iomem *)devfdt_remap_addr(dev);
+	priv->base = (void __iomem *)dev_remap_addr(dev);
 
 	if (!priv->base)
 		return -EINVAL;