HID: apple: properly reflect LEDS dependency

Since hid-apple driver now makes use of LEDS functionality, reflect this
properly in Kconfig.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 9018eacb ("HID: apple: Add support for keyboard backlight on certain T2 Macs.")
Signed-off-by: Jiri Kosina <jkosina@suse.cz>