mfd: MAX8998/LP3974 hibernation support

This patch makes the driver to save and restore register values
for hibernation.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/include/linux/mfd/max8998.h b/include/linux/mfd/max8998.h
index f8c9f88..686a744 100644
--- a/include/linux/mfd/max8998.h
+++ b/include/linux/mfd/max8998.h
@@ -88,6 +88,7 @@
 	int				buck1_set1;
 	int				buck1_set2;
 	int				buck2_set3;
+	bool				wakeup;
 };
 
 #endif /*  __LINUX_MFD_MAX8998_H */