gpio: gpio-twl4030.c: Cleaning up null pointer checks that could never happen

Removal of null pointer checks that could never happen

This was found using a static code analysis program called cppcheck

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c
index 3ebb1a5..826da37 100644
--- a/drivers/gpio/gpio-twl4030.c
+++ b/drivers/gpio/gpio-twl4030.c
@@ -554,7 +554,7 @@
 
 	platform_set_drvdata(pdev, priv);
 
-	if (pdata && pdata->setup) {
+	if (pdata->setup) {
 		int status;
 
 		status = pdata->setup(&pdev->dev, priv->gpio_chip.base,