gpio: davinci: Handle the return value of davinci_gpio_irq_setup function

Currently davinci_gpio_irq_setup return value is ignored. Handle the
return value appropriately.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-davinci.c

@@ -237,7 +237,10 @@ static int davinci_gpio_probe(struct platform_device *pdev)
 		goto err;
 
 	platform_set_drvdata(pdev, chips);
-	davinci_gpio_irq_setup(pdev);
+	ret = davinci_gpio_irq_setup(pdev);
+	if (ret)
+		goto err;
+
 	return 0;
 
 err: