eth: fbnic: Avoid garbage value in fbnic_mac_get_sensor_asic()

'fw_cmpl' is uninitialized which makes 'sensor' and '*val' to be stored
garbage value. Remove the whole body of fbnic_mac_get_sensor_asic() and
return -EOPNOTSUPP to fix this problem.

Fixes: d85ebad ("eth: fbnic: Add hardware monitoring support via HWMON interface")
Signed-off-by: Su Hui <suhui@nfschina.com>
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Signed-off-by: NipaLocal <nipa@local>

drivers/net/ethernet/meta/fbnic/fbnic_mac.c

@@ -688,23 +688,7 @@ fbnic_mac_get_eth_mac_stats(struct fbnic_dev *fbd, bool reset,
 
 static int fbnic_mac_get_sensor_asic(struct fbnic_dev *fbd, int id, long *val)
 {
-	struct fbnic_fw_completion fw_cmpl;
-	s32 *sensor;
-
-	switch (id) {
-	case FBNIC_SENSOR_TEMP:
-		sensor = &fw_cmpl.tsene.millidegrees;
-		break;
-	case FBNIC_SENSOR_VOLTAGE:
-		sensor = &fw_cmpl.tsene.millivolts;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	*val = *sensor;
-
-	return 0;
+	return -EOPNOTSUPP;
 }
 
 static const struct fbnic_mac fbnic_mac_asic = {