staging:iio:frequency: drop assign iio_info.driver_module

The equivalent of this is now done via macro magic when
the relevant register call is made.  The actual structure
elements will shortly go away.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>

drivers/staging/iio/frequency/ad9832.c

@@ -290,7 +290,6 @@ static const struct attribute_group ad9832_attribute_group = {
 
 static const struct iio_info ad9832_info = {
 	.attrs = &ad9832_attribute_group,
-	.driver_module = THIS_MODULE,
 };
 
 static int ad9832_probe(struct spi_device *spi)

drivers/staging/iio/frequency/ad9834.c

@@ -381,12 +381,10 @@ static const struct attribute_group ad9833_attribute_group = {
 
 static const struct iio_info ad9834_info = {
 	.attrs = &ad9834_attribute_group,
-	.driver_module = THIS_MODULE,
 };
 
 static const struct iio_info ad9833_info = {
 	.attrs = &ad9833_attribute_group,
-	.driver_module = THIS_MODULE,
 };
 
 static int ad9834_probe(struct spi_device *spi)