backlight: ep93xx: use devm_backlight_device_register()

Use devm_backlight_device_register() to make cleanup paths simpler, and
remove unnecessary remove().

Signed-off-by: Jingoo Han <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/video/backlight/ep93xx_bl.c

···
 	memset(&props, 0, sizeof(struct backlight_properties));
 	props.type = BACKLIGHT_RAW;
 	props.max_brightness = EP93XX_MAX_BRIGHT;
-	bl = backlight_device_register(dev->name, &dev->dev, ep93xxbl,
-				       &ep93xxbl_ops, &props);
+	bl = devm_backlight_device_register(&dev->dev, dev->name, &dev->dev,
+					ep93xxbl, &ep93xxbl_ops, &props);
 	if (IS_ERR(bl))
 		return PTR_ERR(bl);
 
···
 
 	ep93xxbl_update_status(bl);
 
-	return 0;
-}
-
-static int ep93xxbl_remove(struct platform_device *dev)
-{
-	struct backlight_device *bl = platform_get_drvdata(dev);
-
-	backlight_device_unregister(bl);
 	return 0;
 }
 
···
 		.pm	= &ep93xxbl_pm_ops,
 	},
 	.probe		= ep93xxbl_probe,
-	.remove		= ep93xxbl_remove,
 };
 
 module_platform_driver(ep93xxbl_driver);