watchdog: cadence: Simplify with dev_err_probe()

Common pattern of handling deferred probe can be simplified with
dev_err_probe().  Less code and the error value gets printed.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20200901153141.18960-1-krzk@kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

drivers/watchdog/cadence_wdt.c

@@ -334,12 +334,9 @@ static int cdns_wdt_probe(struct platform_device *pdev)
 	watchdog_set_drvdata(cdns_wdt_device, wdt);
 
 	wdt->clk = devm_clk_get(dev, NULL);
-	if (IS_ERR(wdt->clk)) {
-		ret = PTR_ERR(wdt->clk);
-		if (ret != -EPROBE_DEFER)
-			dev_err(dev, "input clock not found\n");
-		return ret;
-	}
+	if (IS_ERR(wdt->clk))
+		return dev_err_probe(dev, PTR_ERR(wdt->clk),
+				     "input clock not found\n");
 
 	ret = clk_prepare_enable(wdt->clk);
 	if (ret) {