mfd: Convert Wolfson MFD drivers to use irq_data accessor function

Actually makes the code larger rathe rthan smaller but does provide some
isolation against core API changes.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/wm8994-irq.c b/drivers/mfd/wm8994-irq.c
index 6259884..29e8faf 100644
--- a/drivers/mfd/wm8994-irq.c
+++ b/drivers/mfd/wm8994-irq.c
@@ -158,14 +158,14 @@
 
 static void wm8994_irq_lock(struct irq_data *data)
 {
-	struct wm8994 *wm8994 = data->chip_data;
+	struct wm8994 *wm8994 = irq_data_get_irq_chip_data(data);
 
 	mutex_lock(&wm8994->irq_lock);
 }
 
 static void wm8994_irq_sync_unlock(struct irq_data *data)
 {
-	struct wm8994 *wm8994 = data->chip_data;
+	struct wm8994 *wm8994 = irq_data_get_irq_chip_data(data);
 	int i;
 
 	for (i = 0; i < ARRAY_SIZE(wm8994->irq_masks_cur); i++) {
@@ -184,7 +184,7 @@
 
 static void wm8994_irq_unmask(struct irq_data *data)
 {
-	struct wm8994 *wm8994 = data->chip_data;
+	struct wm8994 *wm8994 = irq_data_get_irq_chip_data(data);
 	struct wm8994_irq_data *irq_data = irq_to_wm8994_irq(wm8994,
 							     data->irq);
 
@@ -193,7 +193,7 @@
 
 static void wm8994_irq_mask(struct irq_data *data)
 {
-	struct wm8994 *wm8994 = data->chip_data;
+	struct wm8994 *wm8994 = irq_data_get_irq_chip_data(data);
 	struct wm8994_irq_data *irq_data = irq_to_wm8994_irq(wm8994,
 							     data->irq);