Don't loop in a while when sensor data are available.

Ask the number of available sensors once per update.
If the sample rate is higher than the frequency at which we poll the update,
we will get stuck in that while loop.

Author: giulcioffi

src/Arduino_BHY2Host.cpp

@@ -47,7 +47,8 @@ void Arduino_BHY2Host::update()
     if (_passthrough){
       eslovHandler.update();
     } else {
-      while (availableSensorData() > 0) {
+      uint8_t available = availableSensorData();
+      for (int i = 0; i < available; i++) {
         SensorDataPacket data;
         readSensorData(data);
         sensorManager.process(data);