gpio: convert remaining users to gpiochip_add_data()

For completion, sweep the floor from all gpiochip_add() usage so
we can remove that function and get rid of the function wrapper
gpiochip_add().

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpio-vr41xx.c b/drivers/gpio/gpio-vr41xx.c
index 1947531..ac8deb0 100644
--- a/drivers/gpio/gpio-vr41xx.c
+++ b/drivers/gpio/gpio-vr41xx.c
@@ -544,7 +544,7 @@
 
 	vr41xx_gpio_chip.parent = &pdev->dev;
 
-	ret = gpiochip_add(&vr41xx_gpio_chip);
+	ret = gpiochip_add_data(&vr41xx_gpio_chip, NULL);
 	if (!ret) {
 		iounmap(giu_base);
 		return -ENODEV;