iio: hid-sensor: fix return of -EINVAL on invalid values in ret or value

Ensure that when an invalid value in ret or value is found -EINVAL
is returned. A previous commit broke the way the return error is
being returned and instead caused the return code in ret to be
re-assigned rather than be returned.

Fixes: 5d9854ea ("iio: hid-sensor: Store restore poll and hysteresis on S3")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/common/hid-sensors/hid-sensor-attributes.c

@@ -230,7 +230,7 @@ int hid_sensor_write_samp_freq_value(struct hid_sensor_common *st,
 	ret = sensor_hub_set_feature(st->hsdev, st->poll.report_id,
 				     st->poll.index, sizeof(value), &value);
 	if (ret < 0 || value < 0)
-		ret = -EINVAL;
+		return -EINVAL;
 
 	ret = sensor_hub_get_feature(st->hsdev,
 				     st->poll.report_id,
@@ -283,7 +283,7 @@ int hid_sensor_write_raw_hyst_value(struct hid_sensor_common *st,
 				     st->sensitivity.index, sizeof(value),
 				     &value);
 	if (ret < 0 || value < 0)
-		ret = -EINVAL;
+		return -EINVAL;
 
 	ret = sensor_hub_get_feature(st->hsdev,
 				     st->sensitivity.report_id,