soc: qcom: smp2p: Add of_node_put() before goto

Fix following coccicheck warning:
./drivers/soc/qcom/smp2p.c:501:1-33: WARNING: Function
for_each_available_child_of_node should have of_node_put() before goto

Early exits from for_each_available_child_of_node should decrement the
node reference counter.
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211014062350.8942-1-wanjiabing@vivo.com

drivers/soc/qcom/smp2p.c

@@ -573,6 +573,7 @@ static int qcom_smp2p_probe(struct platform_device *pdev)
 		entry = devm_kzalloc(&pdev->dev, sizeof(*entry), GFP_KERNEL);
 		if (!entry) {
 			ret = -ENOMEM;
+			of_node_put(node);
 			goto unwind_interfaces;
 		}
 
@@ -580,19 +581,25 @@ 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)
+		if (ret < 0) {
+			of_node_put(node);
 			goto unwind_interfaces;
+		}
 
 		if (of_property_read_bool(node, "interrupt-controller")) {
 			ret = qcom_smp2p_inbound_entry(smp2p, entry, node);
-			if (ret < 0)
+			if (ret < 0) {
+				of_node_put(node);
 				goto unwind_interfaces;
+			}
 
 			list_add(&entry->node, &smp2p->inbound);
 		} else  {
 			ret = qcom_smp2p_outbound_entry(smp2p, entry, node);
-			if (ret < 0)
+			if (ret < 0) {
+				of_node_put(node);
 				goto unwind_interfaces;
+			}
 
 			list_add(&entry->node, &smp2p->outbound);
 		}