tests/driver_mpu9150: Clean up printf formats

tests/driver_mpu9150/main.c

@@ -83,19 +83,19 @@ int main(void)
     while (1) {
         /* Get accel data in milli g */
         mpu9150_read_accel(&dev, &measurement);
-        printf("Accel data [milli g] - X: %d   Y: %d   Z: %d\n",
+        printf("Accel data [milli g] - X: %"PRId16"   Y: %"PRId16"   Z: %"PRId16"\n",
                 measurement.x_axis, measurement.y_axis, measurement.z_axis);
         /* Get gyro data in dps */
         mpu9150_read_gyro(&dev, &measurement);
-        printf("Gyro data [dps] - X: %d   Y: %d   Z: %d\n",
+        printf("Gyro data [dps] - X: %"PRId16"   Y: %"PRId16"   Z: %"PRId16"\n",
                 measurement.x_axis, measurement.y_axis, measurement.z_axis);
         /* Get compass data in mikro Tesla */
         mpu9150_read_compass(&dev, &measurement);
-        printf("Compass data [mikro T] - X: %d   Y: %d   Z: %d\n",
+        printf("Compass data [mikro T] - X: %"PRId16"   Y: %"PRId16"   Z: %"PRId16"\n",
                 measurement.x_axis, measurement.y_axis, measurement.z_axis);
         /* Get temperature in milli degrees celsius */
         mpu9150_read_temperature(&dev, &temperature);
-        printf("Temperature [milli deg] : %ld\n", temperature);
+        printf("Temperature [milli deg] : %"PRId32"\n", temperature);
         printf("\n+-------------------------------------+\n");
 
         xtimer_usleep(SLEEP);