iio: hid-sensor-prox: Fix return values

IIO_CHAN_INFO_SAMP_FREQ and IIO_CHAN_INFO_HYSTERESIS cases ignored
the actual return values (which could be -EINVAL) and instead
returned IIO_VAL_INT_PLUS_MICRO always. Return the actual value
obtained from the functions. Both functions return IIO_VAL_INT_PLUS_MICRO
upon success.

Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/light/hid-sensor-prox.c

@@ -74,7 +74,6 @@ static int prox_read_raw(struct iio_dev *indio_dev,
 	struct prox_state *prox_state = iio_priv(indio_dev);
 	int report_id = -1;
 	u32 address;
-	int ret;
 	int ret_type;
 	s32 poll_value;
 
@@ -125,14 +124,12 @@ static int prox_read_raw(struct iio_dev *indio_dev,
 		ret_type = IIO_VAL_INT;
 		break;
 	case IIO_CHAN_INFO_SAMP_FREQ:
-		ret = hid_sensor_read_samp_freq_value(
+		ret_type = hid_sensor_read_samp_freq_value(
 				&prox_state->common_attributes, val, val2);
-		ret_type = IIO_VAL_INT_PLUS_MICRO;
 		break;
 	case IIO_CHAN_INFO_HYSTERESIS:
-		ret = hid_sensor_read_raw_hyst_value(
+		ret_type = hid_sensor_read_raw_hyst_value(
 				&prox_state->common_attributes, val, val2);
-		ret_type = IIO_VAL_INT_PLUS_MICRO;
 		break;
 	default:
 		ret_type = -EINVAL;