of/watchdog: gef_wdt.c: fix build breakage

Fixes build error caused by the OF device_node
pointer being moved into struct device

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/watchdog/gef_wdt.c b/drivers/watchdog/gef_wdt.c
index ca0f4c6..1df284f 100644
--- a/drivers/watchdog/gef_wdt.c
+++ b/drivers/watchdog/gef_wdt.c
@@ -273,7 +273,7 @@
 		bus_clk = freq;
 
 	/* Map devices registers into memory */
-	gef_wdt_regs = of_iomap(dev->node, 0);
+	gef_wdt_regs = of_iomap(dev->dev.of_node, 0);
 	if (gef_wdt_regs == NULL)
 		return -ENOMEM;