mfd: fix event masking for da9030

Signed-off-by: NMike Rapoport <mike@compulab.co.il>
Acked-by: NEric Miao <eric.miao@marvell.com>
Signed-off-by: NSamuel Ortiz <sameo@openedhand.com>

drivers/mfd/da903x.c

@@ -267,7 +267,7 @@ static int da9030_mask_events(struct da903x_chip *chip, unsigned int events)
 {
 	uint8_t v[3];
 
-	chip->events_mask &= ~events;
+	chip->events_mask |= events;
 
 	v[0] = (chip->events_mask & 0xff);
 	v[1] = (chip->events_mask >> 8) & 0xff;