coresight-replicator: change replicator_drvdata spinlock's type to raw_spinlock_t

In coresight-replicator drivers, replicator_drvdata->spinlock can be held
during __schedule() by perf_event_task_sched_out()/in().

Since replicator_drvdata->spinlock type is spinlock_t and
perf_event_task_sched_out()/in() is called after acquiring rq_lock,
which is raw_spinlock_t (an unsleepable lock),
this poses an issue in PREEMPT_RT kernel where spinlock_t is sleepable.

To address this, change type replicator_drvdata->spinlock in
coresight-replicator drivers, which can be called
by perf_event_task_sched_out()/in(), from spinlock_t to raw_spinlock_t.

Reviewed-by: James Clark <[e-mail]>
Reviewed-by: Mike Leach <[e-mail]>
Signed-off-by: Yeoreum Yun <[e-mail]>
Signed-off-by: Suzuki K Poulose <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/hwtracing/coresight/coresight-replicator.c

···
 	struct clk		*atclk;
 	struct clk		*pclk;
 	struct coresight_device	*csdev;
-	spinlock_t		spinlock;
+	raw_spinlock_t		spinlock;
 	bool			check_idfilter_val;
 };
 
···
 	unsigned long flags;
 	bool first_enable = false;
 
-	spin_lock_irqsave(&drvdata->spinlock, flags);
+	raw_spin_lock_irqsave(&drvdata->spinlock, flags);
 	if (out->src_refcnt == 0) {
 		if (drvdata->base)
 			rc = dynamic_replicator_enable(drvdata, in->dest_port,
···
 	}
 	if (!rc)
 		out->src_refcnt++;
-	spin_unlock_irqrestore(&drvdata->spinlock, flags);
+	raw_spin_unlock_irqrestore(&drvdata->spinlock, flags);
 
 	if (first_enable)
 		dev_dbg(&csdev->dev, "REPLICATOR enabled\n");
···
 	unsigned long flags;
 	bool last_disable = false;
 
-	spin_lock_irqsave(&drvdata->spinlock, flags);
+	raw_spin_lock_irqsave(&drvdata->spinlock, flags);
 	if (--out->src_refcnt == 0) {
 		if (drvdata->base)
 			dynamic_replicator_disable(drvdata, in->dest_port,
 						   out->src_port);
 		last_disable = true;
 	}
-	spin_unlock_irqrestore(&drvdata->spinlock, flags);
+	raw_spin_unlock_irqrestore(&drvdata->spinlock, flags);
 
 	if (last_disable)
 		dev_dbg(&csdev->dev, "REPLICATOR disabled\n");
···
 	}
 	dev->platform_data = pdata;
 
-	spin_lock_init(&drvdata->spinlock);
+	raw_spin_lock_init(&drvdata->spinlock);
 	desc.type = CORESIGHT_DEV_TYPE_LINK;
 	desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
 	desc.ops = &replicator_cs_ops;