staging:iio:adc:naming: dev_info to indio_dev for consistency

We had a random missmatch of these two.  Lets pick the most common
and get rid of the other.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/iio/adc/ad7887_core.c b/drivers/staging/iio/adc/ad7887_core.c
index 37e6cc9..9456c03 100644
--- a/drivers/staging/iio/adc/ad7887_core.c
+++ b/drivers/staging/iio/adc/ad7887_core.c
@@ -31,24 +31,24 @@
 	return (st->data[(ch * 2)] << 8) | st->data[(ch * 2) + 1];
 }
 
-static int ad7887_read_raw(struct iio_dev *dev_info,
+static int ad7887_read_raw(struct iio_dev *indio_dev,
 			   struct iio_chan_spec const *chan,
 			   int *val,
 			   int *val2,
 			   long m)
 {
 	int ret;
-	struct ad7887_state *st = iio_priv(dev_info);
+	struct ad7887_state *st = iio_priv(indio_dev);
 	unsigned int scale_uv;
 
 	switch (m) {
 	case 0:
-		mutex_lock(&dev_info->mlock);
-		if (iio_buffer_enabled(dev_info))
+		mutex_lock(&indio_dev->mlock);
+		if (iio_buffer_enabled(indio_dev))
 			ret = ad7887_scan_from_ring(st, 1 << chan->address);
 		else
 			ret = ad7887_scan_direct(st, chan->address);
-		mutex_unlock(&dev_info->mlock);
+		mutex_unlock(&indio_dev->mlock);
 
 		if (ret < 0)
 			return ret;