improve ublox gps chip init

include/gpsread.h

@@ -9,7 +9,11 @@
 #include <Wire.h>
 #endif
 
-#define NMEA_FRAME_SIZE 82 // NEMA has a maxium of 82 bytes per record
+#ifndef GPS_BAUDRATE
+#define GPS_BAUDRATE 115200
+#endif
+
+#define NMEA_FRAME_SIZE 82           // NEMA has a maxium of 82 bytes per record
 #define NMEA_COMPENSATION_FACTOR 480 // empiric for Ublox Neo 6M
 
 extern TinyGPSPlus gps; // Make TinyGPS++ instance globally availabe