scsi: qla2xxx: target: Add WQ_PERCPU to alloc_workqueue() users

This continues the effort to refactor workqueue APIs, which began with
the introduction of new workqueues and a new alloc_workqueue() flag in:

   commit 128ea9f ("workqueue: Add system_percpu_wq and system_dfl_wq")
   commit 930c2ea ("workqueue: Add new WQ_PERCPU flag")

The refactoring is going to alter the default behavior of
alloc_workqueue() to be unbound by default.

With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND),
any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND
must now use WQ_PERCPU. For more details see the Link tag below.

In order to keep alloc_workqueue() behavior identical, explicitly
request WQ_PERCPU.

Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Link: https://patch.msgid.link/20260113145711.242316-4-marco.crivellari@suse.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: DispatchCode

drivers/scsi/qla2xxx/qla_target.c

@@ -8390,7 +8390,7 @@ int __init qlt_init(void)
 		goto out_plogi_cachep;
 	}
 
-	qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
+	qla_tgt_wq = alloc_workqueue("qla_tgt_wq", WQ_PERCPU, 0);
 	if (!qla_tgt_wq) {
 		ql_log(ql_log_fatal, NULL, 0xe06f,
 		    "alloc_workqueue for qla_tgt_wq failed\n");