mavlink: don't use the file logging on Snapdragon

src/modules/mavlink/mavlink_messages.cpp

@@ -403,7 +403,7 @@ protected:
 
 
 // TODO: the logging doesn't work on Snapdragon yet because of file paths.
-#ifndef __PX4_QURT
+#ifdef __PX4_POSIX_EAGLE
 			/* write log messages in first instance to disk */
 			if (_mavlink->get_instance_id() == 0) {
 				if (fp) {
@@ -448,10 +448,10 @@ protected:
 						}
 					}
 				}
+#endif
 			}
 		}
 	}
-#endif
 };
 
 class MavlinkStreamCommandLong : public MavlinkStream