scsi: lpfc: Fix failure to delete vports when discovery is in progress

scsi: lpfc: Fix failure to delete vports when discovery is in progress

Requests to delete an NPIV port may fail repeatedly if the initial request
is received during discovery.

If the FC_UNLOADING load_flag is set, then skip CT response processing for
the physical port.  This allows discovery processing for other lpfc_vport
objects to reach their cmpl routines before deleting the vport.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20240131185112.149731-8-justintee8345@gmail.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>