iio: hid-sensors: typo leads to potential forever loop

The "i < " was missing in this condition.

Fixes: 5d02edfc3957 ('iio: hid-sensors: Convert units and exponent')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

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

@@ -327,7 +327,7 @@ int hid_sensor_format_scale(u32 usage_id,
 	*val0 = 1;
 	*val1 = 0;
 
-	for (i = 0; ARRAY_SIZE(unit_conversion); ++i) {
+	for (i = 0; i < ARRAY_SIZE(unit_conversion); ++i) {
 		if (unit_conversion[i].usage_id == usage_id &&
 			unit_conversion[i].unit == attr_info->units) {
 			exp  = hid_sensor_convert_exponent(