iio: position: hid-sensor-custom-intel-hinge: replace sprintf() with sysfs_emit()

Update the hinge_read_label() function to use sysfs_emit() for generating
labels.

Signed-off-by: Nuno Sá <[e-mail]>
Acked-by: Srinivas Pandruvada <[e-mail]>
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/position/hid-sensor-custom-intel-hinge.c

···
 {
 	struct hinge_state *st = iio_priv(indio_dev);
 
-	return sprintf(label, "%s\n", st->labels[chan->channel]);
+	return sysfs_emit(label, "%s\n", st->labels[chan->channel]);
 }
 
 static const struct iio_info hinge_info = {