[S390] driver_data access

Replace the remaining direct accesses to the driver_data pointer
with calls to the dev_get_drvdata() and dev_set_drvdata() functions.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index 9047b62..d6a022f 100644
--- a/drivers/s390/char/raw3270.c
+++ b/drivers/s390/char/raw3270.c
@@ -1322,7 +1322,7 @@
 	struct raw3270_view *view;
 	unsigned long flags;
 
-	rp = cdev->dev.driver_data;
+	rp = dev_get_drvdata(&cdev->dev);
 	if (!rp)
 		return 0;
 	spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
@@ -1348,7 +1348,7 @@
 	struct raw3270 *rp;
 	unsigned long flags;
 
-	rp = cdev->dev.driver_data;
+	rp = dev_get_drvdata(&cdev->dev);
 	if (!rp)
 		return 0;
 	spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);