staging: iio: adis16240 add _index attribute registration

Signed-off-by: NJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: NManuel Stahl <manuel.stahl@iis.fraunhofer.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/accel/adis16240_ring.c

@@ -33,16 +33,23 @@ static IIO_CONST_ATTR_SCAN_EL_TYPE(timestamp, s, 64, 64);
 
 static struct attribute *adis16240_scan_el_attrs[] = {
 	&iio_scan_el_in_supply.dev_attr.attr,
+	&iio_const_attr_in_supply_index.dev_attr.attr,
 	&iio_const_attr_in_supply_type.dev_attr.attr,
 	&iio_scan_el_accel_x.dev_attr.attr,
+	&iio_const_attr_accel_x_index.dev_attr.attr,
 	&iio_scan_el_accel_y.dev_attr.attr,
+	&iio_const_attr_accel_y_index.dev_attr.attr,
 	&iio_scan_el_accel_z.dev_attr.attr,
+	&iio_const_attr_accel_z_index.dev_attr.attr,
 	&iio_const_attr_accel_type.dev_attr.attr,
 	&iio_scan_el_in0.dev_attr.attr,
+	&iio_const_attr_in0_index.dev_attr.attr,
 	&iio_const_attr_in0_type.dev_attr.attr,
 	&iio_scan_el_temp.dev_attr.attr,
+	&iio_const_attr_temp_index.dev_attr.attr,
 	&iio_const_attr_temp_type.dev_attr.attr,
 	&iio_scan_el_timestamp.dev_attr.attr,
+	&iio_const_attr_timestamp_index.dev_attr.attr,
 	&iio_const_attr_timestamp_type.dev_attr.attr,
 	NULL,
 };