scsi: hisi_sas: queue debugfs dump work before FLR

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

Debugfs dump should be executed before FLR run for we have to dump some
registers before reset by FLR. So it's wrong to queue debugfs dump work
when running FLR work for these two work queue in same workqueue. It
mean that Debugfs dump work is alway execute after FLR and get data
which is reset.

Signed-off-by: Yang Xingui <yangxingui@huawei.com>
Reviewed-by: Kangfenglong <kangfenglong@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>