scsi: qla2xxx: Fix NVMe session hang on unload

Send aborts only when chip is active.

Fixes: 623ee824 ("scsi: qla2xxx: Fix FC-NVMe IO abort during driver reset")
Cc: <stable@vger.kernel.org> # 4.14
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>