The current get portinfo handling filters the LID being sent,
changing zero to 0xffff.

This causes OpenSM to log excessive warning messages.
Reviewed-by: NEdward Mascarenhas <edward.mascarenhas@qlogic.com>
Signed-off-by: NMike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>