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/Makefile b/drivers/mfd/Makefile
index 9d730a2..530620a 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -48,6 +48,9 @@
 ifeq ($(CONFIG_MFD_WM8997),y)
 obj-$(CONFIG_MFD_ARIZONA)	+= wm8997-tables.o
 endif
+ifeq ($(CONFIG_MFD_WM8998),y)
+obj-$(CONFIG_MFD_ARIZONA)	+= wm8998-tables.o
+endif
 obj-$(CONFIG_MFD_WM8400)	+= wm8400-core.o
 wm831x-objs			:= wm831x-core.o wm831x-irq.o wm831x-otp.o
 wm831x-objs			+= wm831x-auxadc.o