gpio: arizona: add support for WM8998 and WM1814

Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpio-arizona.c b/drivers/gpio/gpio-arizona.c
index 052fbc8..ca00273 100644
--- a/drivers/gpio/gpio-arizona.c
+++ b/drivers/gpio/gpio-arizona.c
@@ -118,6 +118,8 @@
 	case WM5110:
 	case WM8280:
 	case WM8997:
+	case WM8998:
+	case WM1814:
 		arizona_gpio->gpio_chip.ngpio = 5;
 		break;
 	default: