mfd: mt6397: int_con and int_status may vary in location

MT6323 has the INT_CON and INT_STATUS located at a different position.
Make the registers locations configurable.

Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

include/linux/mfd/mt6397/core.h

@@ -60,6 +60,8 @@ struct mt6397_chip {
 	u16 wake_mask[2];
 	u16 irq_masks_cur[2];
 	u16 irq_masks_cache[2];
+	u16 int_con[2];
+	u16 int_status[2];
 };
 
 #endif /* __MFD_MT6397_CORE_H__ */