AP_Avoidance: Console output can be disabled

libraries/AP_Avoidance/AP_Avoidance.cpp

@@ -147,7 +147,7 @@ void AP_Avoidance::init(void)
 
         if (_obstacles == nullptr) {
             // dynamic RAM allocation of _obstacles[] failed, disable gracefully
-            hal.console->printf("Unable to initialize Avoidance obstacle list\n");
+            DEV_PRINTF("Unable to initialize Avoidance obstacle list\n");
             // disable ourselves to avoid repeated allocation attempts
             _enabled.set(0);
             return;