scsi: lpfc: Skip RSCN processing when FC_UNLOADING flag is set

scsi: lpfc: Skip RSCN processing when FC_UNLOADING flag is set

During rmmod, all ndlp objects are cleaned up and marked with the
NLP_DROPPED flag indicating that an ndlp object is currently being
released.  Thus, if an RSCN is received during driver unload, then
walking the fc_nodes list to process the RSCN is unnecessary because the
ndlp objects are very shortly going to be released.

In the lpfc_rscn_recovery_check routine, early return if the driver is in
the middle of unloading by checking for the FC_UNLOADING flag.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20250618192138.124116-5-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>