drivers/video/backlight/da903x.c: introduce one more missing kfree

One more error handling code should have kfree as well
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Acked-by: Eric Miao <eric.miao@marvell.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/backlight/da903x.c

@@ -131,6 +131,7 @@ static int da903x_backlight_probe(struct platform_device *pdev)
 			data, &da903x_backlight_ops);
 	if (IS_ERR(bl)) {
 		dev_err(&pdev->dev, "failed to register backlight\n");
+		kfree(data);
 		return PTR_ERR(bl);
 	}