The command IOCB ndlp pointer is overwritten in lpfc_issue_els_rdf(), and
the original ndlp pointer is stored ahead of time.

This null ptr assignment can be safely removed.

Link: https://lore.kernel.org/r/20220412222008.126521-13-jsmart2021@gmail.comCo-developed-by: NJustin Tee <justin.tee@broadcom.com>
Signed-off-by: NJustin Tee <justin.tee@broadcom.com>
Signed-off-by: NJames Smart <jsmart2021@gmail.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>