iio:dac: drop assignment of iio_info.driver_module

The equivalent of this is now done via macro magic when
the relevant register call is made.  The actual structure
element will shortly go away.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>

drivers/iio/dac/ad5380.c

@@ -237,7 +237,6 @@ static int ad5380_read_raw(struct iio_dev *indio_dev,
 static const struct iio_info ad5380_info = {
 	.read_raw = ad5380_read_raw,
 	.write_raw = ad5380_write_raw,
-	.driver_module = THIS_MODULE,
 };
 
 static struct iio_chan_spec_ext_info ad5380_ext_info[] = {