iio: accel: bcm150: Remove handling for regmap raw_read_max

	int sample_length = 3 * 2;

	int ret;

	int total_length = samples * sample_length;

	int i;

	size_t step = regmap_get_raw_read_max(data->regmap);

	if (!step || step > total_length)

		step = total_length;

	else if (step < total_length)

		step = sample_length;

	/*

	 * Seems we have a bus with size limitation so we have to execute

	 * multiple reads

	 */

	for (i = 0; i < total_length; i += step) {

	ret = regmap_raw_read(data->regmap, BMC150_ACCEL_REG_FIFO_DATA,

				      &buffer[i], step);

		if (ret)

			break;

	}

			      buffer, total_length);

	if (ret)

		dev_err(dev,

			"Error transferring data from fifo in single steps of %zu\n",

			step);

			"Error transferring data from fifo: %d\n", ret);

	return ret;

}