HID: apple: move backlight report structs to other backlight structs

The apple_backlight_config_report and apple_backlight_set_report structs
were incorrectly placed between the translation tables. Fix this.

Signed-off-by: Aditya Garg <gargaditya08@live.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>