GCS_MAVLink: Console output can be disabled

libraries/GCS_MAVLink/GCS_Dummy.cpp

@@ -13,9 +13,9 @@ const struct GCS_MAVLINK::stream_entries GCS_MAVLINK::all_stream_entries[] {};
 void GCS_Dummy::send_textv(MAV_SEVERITY severity, const char *fmt, va_list arg_list, uint8_t dest_bitmask)
 {
 #if !APM_BUILD_TYPE(APM_BUILD_Replay)
-    hal.console->printf("TOGCS: ");
+    DEV_PRINTF("TOGCS: ");
     hal.console->vprintf(fmt, arg_list);
-    hal.console->printf("\n");
+    DEV_PRINTF("\n");
 #else
     ::printf("TOGCS: ");
     ::vprintf(fmt, arg_list);

libraries/GCS_MAVLink/GCS_Signing.cpp

@@ -134,7 +134,7 @@ void GCS_MAVLINK::load_signing_key(void)
     }
     mavlink_status_t *status = mavlink_get_channel_status(chan);
     if (status == nullptr) {
-        hal.console->printf("Failed to load signing key - no status");
+        DEV_PRINTF("Failed to load signing key - no status");
         return;        
     }
     memcpy(signing.secret_key, key.secret_key, 32);