led: Use STATUS_LED_ON and STATUS_LED_OFF when calling __led_set

This fixes the gpio_led driver which needs to compare againt a
STATUS_LED_ON to enable a led.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
mx23_olinuxino: Add support for status LED

This allow user to know if the bootloader is running, even without a
serial console.

Series-to: uboot

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>