AP_Notify: Add navigator board

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

libraries/AP_Notify/AP_Notify.cpp

@@ -221,6 +221,8 @@ void AP_Notify::add_backends(void)
                 ADD_BACKEND(new RCOutputRGBLed(HAL_RCOUT_RGBLED_RED, HAL_RCOUT_RGBLED_GREEN, HAL_RCOUT_RGBLED_BLUE));
   #elif CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_DISCO
                 ADD_BACKEND(new DiscoLED());
+  #elif CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_NAVIGATOR
+                ADD_BACKEND(new DiscreteRGBLed(HAL_RGBLED_RED, HAL_RGBLED_GREEN, HAL_RGBLED_BLUE, HAL_RGBLED_NORMAL_POLARITY));
   #endif
 #endif // CONFIG_HAL_BOARD == HAL_BOARD_LINUX