pinctrl: abx500: Add terminating entry for of_device_id table

The of_device_id table is supposed to be zero-terminated.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-abx500.c

@@ -834,6 +834,7 @@ static const struct of_device_id abx500_gpio_match[] = {
 	{ .compatible = "stericsson,ab8505-gpio", .data = (void *)PINCTRL_AB8505, },
 	{ .compatible = "stericsson,ab8540-gpio", .data = (void *)PINCTRL_AB8540, },
 	{ .compatible = "stericsson,ab9540-gpio", .data = (void *)PINCTRL_AB9540, },
+	{ }
 };
 
 static int abx500_gpio_probe(struct platform_device *pdev)