ARM: s3c64xx: Delete an unnecessary return statement in samsung_bl_set

Fix checkpatch warning:
	WARNING: void function return statements are not generally useful
Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net>
[krzk: Rewrite commit message]
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>

arch/arm/mach-s3c64xx/dev-backlight.c

@@ -141,5 +141,4 @@ void __init samsung_bl_set(struct samsung_bl_gpio_info *gpio_info,
 	kfree(samsung_bl_data);
 err_data:
 	kfree(samsung_bl_device);
-	return;
 }