watchdog: xen_wdt: Use 'dev' instead of dereferencing it repeatedly

Introduce local variable 'struct device *dev' and use it instead of
dereferencing it repeatedly.

The conversion was done automatically with coccinelle using the
following semantic patches. The semantic patches and the scripts
used to generate this commit log are available at
https://github.com/groeck/coccinelle-patchesSigned-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

drivers/watchdog/xen_wdt.c

@@ -122,35 +122,35 @@ static struct watchdog_device xen_wdt_dev = {
 
 static int xen_wdt_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct sched_watchdog wd = { .id = ~0 };
 	int ret = HYPERVISOR_sched_op(SCHEDOP_watchdog, &wd);
 
 	if (ret == -ENOSYS) {
-		dev_err(&pdev->dev, "watchdog not supported by hypervisor\n");
+		dev_err(dev, "watchdog not supported by hypervisor\n");
 		return -ENODEV;
 	}
 
 	if (ret != -EINVAL) {
-		dev_err(&pdev->dev, "unexpected hypervisor error (%d)\n", ret);
+		dev_err(dev, "unexpected hypervisor error (%d)\n", ret);
 		return -ENODEV;
 	}
 
 	if (watchdog_init_timeout(&xen_wdt_dev, timeout, NULL))
-		dev_info(&pdev->dev, "timeout value invalid, using %d\n",
-			xen_wdt_dev.timeout);
+		dev_info(dev, "timeout value invalid, using %d\n",
+			 xen_wdt_dev.timeout);
 	watchdog_set_nowayout(&xen_wdt_dev, nowayout);
 	watchdog_stop_on_reboot(&xen_wdt_dev);
 	watchdog_stop_on_unregister(&xen_wdt_dev);
 
-	ret = devm_watchdog_register_device(&pdev->dev, &xen_wdt_dev);
+	ret = devm_watchdog_register_device(dev, &xen_wdt_dev);
 	if (ret) {
-		dev_err(&pdev->dev, "cannot register watchdog device (%d)\n",
-			ret);
+		dev_err(dev, "cannot register watchdog device (%d)\n", ret);
 		return ret;
 	}
 
-	dev_info(&pdev->dev, "initialized (timeout=%ds, nowayout=%d)\n",
-		xen_wdt_dev.timeout, nowayout);
+	dev_info(dev, "initialized (timeout=%ds, nowayout=%d)\n",
+		 xen_wdt_dev.timeout, nowayout);
 
 	return 0;
 }