soc: imx: scu: use devm_kasprintf

	/* format soc_id value passed from SCU firmware */

	val = id & 0x1f;

	soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "0x%x", val);

	soc_dev_attr->soc_id = devm_kasprintf(&pdev->dev, GFP_KERNEL, "0x%x", val);

	if (!soc_dev_attr->soc_id)

		return -ENOMEM;

	/* format revision value passed from SCU firmware */

	val = (id >> 5) & 0xf;

	val = (((val >> 2) + 1) << 4) | (val & 0x3);

	soc_dev_attr->revision = kasprintf(GFP_KERNEL,

					   "%d.%d",

					   (val >> 4) & 0xf,

					   val & 0xf);

	if (!soc_dev_attr->revision) {

		ret = -ENOMEM;

		goto free_soc_id;

	}

	soc_dev_attr->revision = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%d.%d",

						(val >> 4) & 0xf, val & 0xf);

	if (!soc_dev_attr->revision)

		return -ENOMEM;

	soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", uid);

	if (!soc_dev_attr->serial_number) {

		ret = -ENOMEM;

		goto free_revision;

	}

	soc_dev_attr->serial_number = devm_kasprintf(&pdev->dev, GFP_KERNEL,

						     "%016llX", uid);

	if (!soc_dev_attr->serial_number)

		return -ENOMEM;

	soc_dev = soc_device_register(soc_dev_attr);

	if (IS_ERR(soc_dev)) {

		ret = PTR_ERR(soc_dev);

		goto free_serial_number;

	}

	if (IS_ERR(soc_dev))

		return PTR_ERR(soc_dev);

	return 0;

free_serial_number:

	kfree(soc_dev_attr->serial_number);

free_revision:

	kfree(soc_dev_attr->revision);

free_soc_id:

	kfree(soc_dev_attr->soc_id);

	return ret;

}

static struct platform_driver imx_scu_soc_driver = {