Increase the limit to match available values in dt-bindings/leds/common.h

Fixes: 472d7b9e ("dt-bindings: leds: Expand LED_COLOR_ID definitions")
Signed-off-by: Ondrej Jirman <megi@xff.cz>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231008142103.1174028-1-megi@xff.czSigned-off-by: Lee Jones <lee@kernel.org>