drivers/video/backlight/s6e63m0.c: unregister backlight device and remove sysfs attribute file in s6e63m0_remove

s6e63m0_probe() registered backlight device and create sysfs attribute
files, thus s6e63m0_remove() should unregister backlight device and remove
sysfs attribute files.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Richard Purdie <rpurdie@linux.intel.com>
Cc: InKi Dae <inki.dae@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/backlight/s6e63m0.c

@@ -829,6 +829,9 @@ static int __devexit s6e63m0_remove(struct spi_device *spi)
 	struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
 
 	s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
+	device_remove_file(&spi->dev, &dev_attr_gamma_table);
+	device_remove_file(&spi->dev, &dev_attr_gamma_mode);
+	backlight_device_unregister(lcd->bd);
 	lcd_device_unregister(lcd->ld);
 	kfree(lcd);