scsi: qla2xxx: Remove return value from qla_nvme_ls()

scsi: qla2xxx: Remove return value from qla_nvme_ls()

The function always returns QLA_SUCCESS and the caller qla2x00_start_sp()
doesn't even evalute the return value. So there is no point in returning a
status.

Link: https://lore.kernel.org/r/20200520130819.90625-1-dwagner@suse.de
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>