ata: libahci_platform: Add of_node_put() before loop exit

Each iteration of for_each_child_of_node puts the previous node, but
in the case of a goto from the middle of the loop, there is no put,
thus causing a memory leak. Add an of_node_put before three such goto
statements.
Issue found with Coccinelle.

Reviewed-by: Hans de Goede <[e-mail]>
Signed-off-by: Nishka Dasgupta <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

drivers/ata/libahci_platform.c

···
 
 			if (of_property_read_u32(child, "reg", &port)) {
 				rc = -EINVAL;
+				of_node_put(child);
 				goto err_out;
 			}
 
···
 			if (port_dev) {
 				rc = ahci_platform_get_regulator(hpriv, port,
 								&port_dev->dev);
-				if (rc == -EPROBE_DEFER)
+				if (rc == -EPROBE_DEFER) {
+					of_node_put(child);
 					goto err_out;
+				}
 			}
 #endif
 
 			rc = ahci_platform_get_phy(hpriv, port, dev, child);
-			if (rc)
+			if (rc) {
+				of_node_put(child);
 				goto err_out;
+			}
 
 			enabled_ports++;
 		}