staging:iio: add hook to allow core to perform scan related config.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/iio.h

@@ -262,7 +262,8 @@ struct iio_info {
 				 int val);
 	int (*validate_trigger)(struct iio_dev *indio_dev,
 				struct iio_trigger *trig);
-
+	int (*update_scan_mode)(struct iio_dev *indio_dev,
+				const unsigned long *scan_mask);
 };
 
 /**