mfd: mfd_cell is now implicitly available to janz drivers

The cell's platform_data is now accessed with a helper function;
change clients to use that, and remove the now-unused data_size.

Signed-off-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/gpio/janz-ttl.c b/drivers/gpio/janz-ttl.c
index 813ac07..2514fb0 100644
--- a/drivers/gpio/janz-ttl.c
+++ b/drivers/gpio/janz-ttl.c
@@ -15,6 +15,7 @@
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/platform_device.h>
+#include <linux/mfd/core.h>
 #include <linux/io.h>
 #include <linux/gpio.h>
 #include <linux/slab.h>
@@ -149,7 +150,7 @@
 	struct resource *res;
 	int ret;
 
-	pdata = pdev->dev.platform_data;
+	pdata = mfd_get_data(pdev);
 	if (!pdata) {
 		dev_err(dev, "no platform data\n");
 		ret = -ENXIO;