Another rewrite: most of the polling, reading and writing is now inside the GPS classes

apps/drivers/gps/gps_helper.cpp

@@ -57,6 +57,8 @@ GPS_Helper::set_baudrate(const int &fd, unsigned baud)
 
 	case 115200: speed = B115200; break;
 
+	warnx("try baudrate: %d\n", speed);
+
 	default:
 		warnx("ERROR: Unsupported baudrate: %d\n", baud);
 		return -EINVAL;