infiniband: ehca: remove driver_data direct access of struct device

In the near future, the driver core is going to not allow direct access
to the driver_data pointer in struct device. Instead, the functions
dev_get_drvdata() and dev_set_drvdata() should be used. These functions
have been around since the beginning, so are backwards compatible with
all older kernel versions.

Cc: Sean Hefty <[e-mail]>
Cc: Roland Dreier <[e-mail]>
Cc: Hal Rosenstock <[e-mail]>
Cc: [e-mail]
Cc: Christoph Raisch <[e-mail]>
Acked-by: Hoang-Nam Nguyen <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/infiniband/hw/ehca/ehca_main.c

···
 	struct hipz_query_hca *rblock;				           \
 	int data;                                                          \
 									   \
-	shca = dev->driver_data;					   \
+	shca = dev_get_drvdata(dev);					   \
 									   \
 	rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);			   \
 	if (!rblock) {						           \
···
 					struct device_attribute *attr,
 					char *buf)
 {
-	struct ehca_shca *shca = dev->driver_data;
+	struct ehca_shca *shca = dev_get_drvdata(dev);
 
 	return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
 
···
 
 	shca->ofdev = dev;
 	shca->ipz_hca_handle.handle = *handle;
-	dev->dev.driver_data = shca;
+	dev_set_drvdata(&dev->dev, shca);
 
 	ret = ehca_sense_attributes(shca);
 	if (ret < 0) {
···
 
 static int __devexit ehca_remove(struct of_device *dev)
 {
-	struct ehca_shca *shca = dev->dev.driver_data;
+	struct ehca_shca *shca = dev_get_drvdata(&dev->dev);
 	unsigned long flags;
 	int ret;