powerpc/powermac: add missing of_node_put

for_each_node_by_name performs an of_node_get on each
iteration, so a break out of the loop requires an
of_node_put.

This was done using the Coccinelle semantic patch
iterators/for_each_child.cocci
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230907095521.14053-4-Julia.Lawall@inria.fr

arch/powerpc/platforms/powermac/low_i2c.c

@@ -925,8 +925,10 @@ static void __init smu_i2c_probe(void)
 
 		sz = sizeof(struct pmac_i2c_bus) + sizeof(struct smu_i2c_cmd);
 		bus = kzalloc(sz, GFP_KERNEL);
-		if (bus == NULL)
+		if (bus == NULL) {
+			of_node_put(busnode);
 			return;
+		}
 
 		bus->controller = controller;
 		bus->busnode = of_node_get(busnode);

arch/powerpc/platforms/powermac/smp.c

@@ -598,8 +598,10 @@ static void __init smp_core99_setup_i2c_hwsync(int ncpus)
 			name = "Pulsar";
 			break;
 		}
-		if (pmac_tb_freeze != NULL)
+		if (pmac_tb_freeze != NULL) {
+			of_node_put(cc);
 			break;
+		}
 	}
 	if (pmac_tb_freeze != NULL) {
 		/* Open i2c bus for synchronous access */