scsi: hisi_sas: Remove redundant checks for automatic debugfs dump

scsi: hisi_sas: Remove redundant checks for automatic debugfs dump

In commit 63f0733d07ce ("scsi: hisi_sas: Allocate DFX memory during dump
trigger"), the memory allocation time of the DFX is changed from device
initialization to dump occurs, so .debugfs_itct is not a valid address and
do not need to check.

The parameter hisi_sas_debugfs_enable is enough to check whether automatic
debugfs dump is triggered, so remove redunant checks.

Fixes: 63f0733d07ce ("scsi: hisi_sas: Allocate DFX memory during dump trigger")
Signed-off-by: Yihang Li <liyihang9@huawei.com>
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Link: https://lore.kernel.org/r/1705904747-62186-3-git-send-email-chenxiang66@hisilicon.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>