mfd: arizona: Add support for WM8998 and WM1814

Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/arizona-irq.c b/drivers/mfd/arizona-irq.c
index 2b9965d5..bb0063d 100644
--- a/drivers/mfd/arizona-irq.c
+++ b/drivers/mfd/arizona-irq.c
@@ -234,6 +234,15 @@
 		arizona->ctrlif_error = false;
 		break;
 #endif
+#ifdef CONFIG_MFD_WM8998
+	case WM8998:
+	case WM1814:
+		aod = &wm8998_aod;
+		irq = &wm8998_irq;
+
+		arizona->ctrlif_error = false;
+		break;
+#endif
 	default:
 		BUG_ON("Unknown Arizona class device" == NULL);
 		return -EINVAL;