gdsys_rxaui_ctrl: Use new regmap interface

For the DM case, use the proper parameter for the regmap_init_mem call
(which is the ofnode, not the udevice).
Signed-off-by: NMario Six <mario.six@gdsys.cc>

drivers/misc/gdsys_rxaui_ctrl.c

@@ -59,7 +59,7 @@ int gdsys_rxaui_ctrl_probe(struct udevice *dev)
 {
 	struct gdsys_rxaui_ctrl_priv *priv = dev_get_priv(dev);
 
-	regmap_init_mem(dev, &priv->map);
+	regmap_init_mem(dev_ofnode(dev), &priv->map);
 
 	priv->state = false;