scsi: libfc: fix ELS request handling

The modification of fc_lport_recv_els_req() in commit fcabb09e ("scsi:
libfc: directly call ELS request handlers") caused certain requests not to be
handled at all.  Fix that.

Fixes: fcabb09e ("scsi: libfc: directly call ELS request handlers")
Signed-off-by: Martin Wilck <mwilck@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>