dt-bindings: leds: leds-mt6323: Document mt6332 compatible

Add support for MT6332 LEDs/WLEDs with compatible "mediatek,mt6332-led".

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230601110813.2373764-3-angelogioacchino.delregno@collabora.com