scsi: cancel the inflight async device probe when remove scsi_target

hulk inclusion
category: bugfix
bugzilla: 188150, https://gitee.com/openeuler/kernel/issues/I643OL



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Cancel the inflight async device probe when removing scsi_target, so
no new disk will be added when __scsi_target_remove() returns.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Zhong Jinghua <zhongjinghua@huawei.com>
Reviewed-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>