watchdog: intel-mid_wdt: Add WATCHDOG_NOWAYOUT support

Normally, the watchdog is disabled when /dev/watchdog is closed, but if
CONFIG_WATCHDOG_NOWAYOUT is defined, then it means that the watchdog should
remain enabled. So we should keep it enabled if CONFIG_WATCHDOG_NOWAYOUT
is defined.

Reported-by: Razvan Becheriu <razvan.becheriu@qualitance.com>
Cc: Ferry Toth <fntoth@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Razvan Becheriu <razvan.becheriu@gmail.com>
Link: https://lore.kernel.org/r/20190924143116.69823-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

drivers/watchdog/intel-mid_wdt.c

@@ -134,6 +134,7 @@ static int mid_wdt_probe(struct platform_device *pdev)
 	wdt_dev->timeout = MID_WDT_DEFAULT_TIMEOUT;
 	wdt_dev->parent = dev;
 
+	watchdog_set_nowayout(wdt_dev, WATCHDOG_NOWAYOUT);
 	watchdog_set_drvdata(wdt_dev, dev);
 
 	ret = devm_request_irq(dev, pdata->irq, mid_wdt_irq,