iio: imx7d_adc: Use devm_iio_device_register()

Use devm_iio_device_register() and drop imx7d_adc_remove().
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Cc: Chris Healy <cphealy@gmail.com>
Cc: linux-iio@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/imx7d_adc.c

@@ -554,7 +554,7 @@ static int imx7d_adc_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	ret = iio_device_register(indio_dev);
+	ret = devm_iio_device_register(dev, indio_dev);
 	if (ret) {
 		dev_err(&pdev->dev, "Couldn't register the device.\n");
 		return ret;
@@ -563,21 +563,10 @@ static int imx7d_adc_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int imx7d_adc_remove(struct platform_device *pdev)
-{
-	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
-
-	iio_device_unregister(indio_dev);
-
-	return 0;
-}
-
-
 static SIMPLE_DEV_PM_OPS(imx7d_adc_pm_ops, imx7d_adc_disable, imx7d_adc_enable);
 
 static struct platform_driver imx7d_adc_driver = {
 	.probe		= imx7d_adc_probe,
-	.remove		= imx7d_adc_remove,
 	.driver		= {
 		.name	= "imx7d_adc",
 		.of_match_table = imx7d_adc_match,