Add the missing in_voltageY_mean_raw attribute for the average of voltage
measurements.

Signed-off-by: Marilene Andrade Garcia <marilene.agarcia@gmail.com>
---

When I use _mean_raw (IIO_CHAN_INFO_AVERAGE_RAW), I get a file called 
in_voltageY_mean_raw, so I added it to the documentation. 
Thanks.

 Documentation/ABI/testing/sysfs-bus-iio | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 89b4740dcfa1..6dd67bd4e73d 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -422,6 +422,7 @@ Description:
 		Scaled humidity measurement in milli percent.
 
 What:		/sys/bus/iio/devices/iio:deviceX/in_Y_mean_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_mean_raw
 KernelVersion:	3.5
 Contact:	linux-iio@vger.kernel.org
 Description:
-- 
2.34.1