AP_Notify: replace libuavcan with libcanard based driver

libraries/AP_Notify/AP_Notify.cpp

@@ -348,9 +348,9 @@ void AP_Notify::add_backends(void)
 #endif
                 break;
             case Notify_LED_UAVCAN:
-#if HAL_CANMANAGER_ENABLED
+#if HAL_ENABLE_LIBUAVCAN_DRIVERS
                 ADD_BACKEND(new UAVCAN_RGB_LED(0));
-#endif // HAL_CANMANAGER_ENABLED
+#endif // HAL_ENABLE_LIBUAVCAN_DRIVERS
                 break;
 
             case Notify_LED_Scripting:

libraries/AP_Notify/MMLPlayer.cpp

@@ -64,7 +64,7 @@ void MMLPlayer::start_note(float duration, float frequency, float volume)
     _note_duration_us = duration*1e6;
     hal.util->toneAlarm_set_buzzer_tone(frequency, volume, _note_duration_us/1000U);
 
-#if HAL_CANMANAGER_ENABLED
+#if HAL_ENABLE_LIBUAVCAN_DRIVERS
     // support CAN buzzers too
     uint8_t can_num_drivers = AP::can().get_num_drivers();
 

libraries/AP_Notify/UAVCAN_RGB_LED.cpp

@@ -17,7 +17,7 @@
 #include <AP_HAL/AP_HAL.h>
 #include <AP_HAL/system.h>
 
-#if HAL_CANMANAGER_ENABLED
+#if HAL_ENABLE_LIBUAVCAN_DRIVERS
 #include "UAVCAN_RGB_LED.h"
 
 #include <AP_UAVCAN/AP_UAVCAN.h>