drivers/block/swim.c: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release or
on probe failure. Thus, it is not needed to manually clear the device
driver data to NULL.

Signed-off-by: Jingoo Han <[e-mail]>
Cc: Jean Delvare <[e-mail]>
Cc: Jens Axboe <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/block/swim.c

···
 	return 0;
 
 out_kfree:
-	platform_set_drvdata(dev, NULL);
 	kfree(swd);
 out_iounmap:
 	iounmap(swim_base);
···
 	if (res)
 		release_mem_region(res->start, resource_size(res));
 
-	platform_set_drvdata(dev, NULL);
 	kfree(swd);
 
 	return 0;