watchdog: sama5d4: make use of timeout-secs provided in devicetree

watchdog_init_timeout() will allways pick timeout_param since it
defaults to a valid timeout.

Following best practice described in
Documentation/watchdog/watchdog-kernel-api.txt to make use of
the parameter logic.
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/sama5d4_wdt.c

@@ -33,7 +33,7 @@ struct sama5d4_wdt {
 	unsigned long		last_ping;
 };
 
-static int wdt_timeout = WDT_DEFAULT_TIMEOUT;
+static int wdt_timeout;
 static bool nowayout = WATCHDOG_NOWAYOUT;
 
 module_param(wdt_timeout, int, 0);
@@ -212,7 +212,7 @@ static int sama5d4_wdt_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	wdd = &wdt->wdd;
-	wdd->timeout = wdt_timeout;
+	wdd->timeout = WDT_DEFAULT_TIMEOUT;
 	wdd->info = &sama5d4_wdt_info;
 	wdd->ops = &sama5d4_wdt_ops;
 	wdd->min_timeout = MIN_WDT_TIMEOUT;
@@ -273,7 +273,7 @@ static int sama5d4_wdt_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, wdt);
 
 	dev_info(&pdev->dev, "initialized (timeout = %d sec, nowayout = %d)\n",
-		 wdt_timeout, nowayout);
+		 wdd->timeout, nowayout);
 
 	return 0;
 }