staging:iio:adc:max1363 fix missing update_scan_mask callback.

When moving over to the new sw_ring_preenable I managed to add
this callback to only one of the two iio_info structures. As
such only some devices will currently work.

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

drivers/staging/iio/adc/max1363_core.c

@@ -830,6 +830,7 @@ static struct attribute_group max1363_event_attribute_group = {
 static const struct iio_info max1238_info = {
 	.read_raw = &max1363_read_raw,
 	.driver_module = THIS_MODULE,
+	.update_scan_mode = &max1363_update_scan_mode,
 };
 
 static const struct iio_info max1363_info = {