soc: qcom: smp2p: use scoped device node handling to simplify error paths

Obtain the device node reference with scoped/cleanup.h to reduce error
handling and make the code a bit simpler.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240813-b4-cleanup-h-of-node-put-other-v1-6-cfb67323a95c@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

drivers/soc/qcom/smp2p.c

@@ -539,7 +539,6 @@ static int smp2p_parse_ipc(struct qcom_smp2p *smp2p)
 static int qcom_smp2p_probe(struct platform_device *pdev)
 {
 	struct smp2p_entry *entry;
-	struct device_node *node;
 	struct qcom_smp2p *smp2p;
 	const char *key;
 	int irq;
@@ -593,11 +592,10 @@ static int qcom_smp2p_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto release_mbox;
 
-	for_each_available_child_of_node(pdev->dev.of_node, node) {
+	for_each_available_child_of_node_scoped(pdev->dev.of_node, node) {
 		entry = devm_kzalloc(&pdev->dev, sizeof(*entry), GFP_KERNEL);
 		if (!entry) {
 			ret = -ENOMEM;
-			of_node_put(node);
 			goto unwind_interfaces;
 		}
 
@@ -605,25 +603,19 @@ static int qcom_smp2p_probe(struct platform_device *pdev)
 		spin_lock_init(&entry->lock);
 
 		ret = of_property_read_string(node, "qcom,entry-name", &entry->name);
-		if (ret < 0) {
-			of_node_put(node);
+		if (ret < 0)
 			goto unwind_interfaces;
-		}
 
 		if (of_property_read_bool(node, "interrupt-controller")) {
 			ret = qcom_smp2p_inbound_entry(smp2p, entry, node);
-			if (ret < 0) {
-				of_node_put(node);
+			if (ret < 0)
 				goto unwind_interfaces;
-			}
 
 			list_add(&entry->node, &smp2p->inbound);
 		} else  {
 			ret = qcom_smp2p_outbound_entry(smp2p, entry, node);
-			if (ret < 0) {
-				of_node_put(node);
+			if (ret < 0)
 				goto unwind_interfaces;
-			}
 
 			list_add(&entry->node, &smp2p->outbound);
 		}