iio: remove left-over comments about parent assignment

These were obtained by doing a 'git diff | grep \/\*', in the previous diff
to find comments. These needed a bit more manual review, as the semantic
patch isn't great for catching these.

The result is:
 	/* Initialize Counter device and driver data */
 	/* Initialize IIO device */
 	/* Establish that the iio_dev is a child of the spi device */
 	/* Estabilish that the iio_dev is a child of the spi device */
 	/* Initiate the Industrial I/O device */
 	/* Establish that the iio_dev is a child of the device */
-	/* establish that the iio_dev is a child of the i2c device */
-	/* establish that the iio_dev is a child of the i2c device */
 	/* This is only used for removal purposes */
 	/* setup the industrialio driver allocated elements */
 	/* variant specific configuration */
 	/* Setup for userspace synchronous on demand sampling. */
 	st->readback_delay_us += 5; /* Add tWAIT */
-	/* Establish that the iio_dev is a child of the i2c device */
 	/* Establish that the iio_dev is a child of the i2c device */

Out of which, 4 are really left-over comments about parent assignment.
3 of them are removed by the semantic patch, as the comment removed (by
spatch) would be for an empty line.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/ad7476.c

@@ -300,7 +300,6 @@ static int ad7476_probe(struct spi_device *spi)
 
 	st->spi = spi;
 
-	/* Establish that the iio_dev is a child of the spi device */
 	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;

drivers/iio/adc/ad7887.c

@@ -264,7 +264,6 @@ static int ad7887_probe(struct spi_device *spi)
 	spi_set_drvdata(spi, indio_dev);
 	st->spi = spi;
 
-	/* Estabilish that the iio_dev is a child of the spi device */
 	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->info = &ad7887_info;

drivers/iio/dac/ad5446.c

@@ -250,7 +250,6 @@ static int ad5446_probe(struct device *dev, const char *name,
 	st->reg = reg;
 	st->dev = dev;
 
-	/* Establish that the iio_dev is a child of the device */
 	indio_dev->name = name;
 	indio_dev->info = &ad5446_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;

drivers/staging/iio/cdc/ad7746.c

@@ -693,7 +693,6 @@ static int ad7746_probe(struct i2c_client *client,
 	chip->client = client;
 	chip->capdac_set = -1;
 
-	/* Establish that the iio_dev is a child of the i2c device */
 	indio_dev->name = id->name;
 	indio_dev->info = &ad7746_info;
 	indio_dev->channels = ad7746_channels;