platform/chrome: cros_kbd_led_backlight: provide ID table for avoiding fallback match

Instead of using fallback driver name match, provide ID table[1] for the
primary match.

Also shrink the name for fitting to [2].

[1]: https://elixir.bootlin.com/linux/v6.8/source/drivers/base/platform.c#L1353
[2]: https://elixir.bootlin.com/linux/v6.8/source/include/linux/mod_devicetable.h#L608



Reviewed-by: Benson Leung <bleung@chromium.org>
Link: https://lore.kernel.org/r/20240329075630.2069474-15-tzungbi@kernel.org


Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>