- Removed an unnecessary newline from dump_line call.

  h->rom_id for IUCV connections already has a newline at the end.
- Changed the logic for IUCV detection to only include netiucv type devices
  Since /sys/bus/iucv/devices/ contains a "generic" netiucv entry as well
  as any activated devices,such as netiucv0, or netiucv1, the extra logic
  to add an unactivated device is no longer needed, so it has been removed.
- Deleted an unused variable (dl) from s390.c.