cpuidle: psci: Fix uninitialized variable in dt_idle_state_present()

If the first cpu_node = of_cpu_device_node_get() fails then the cleanup.h
code will try to free "state_node" but it hasn't been initialized yet.
Declare the device_nodes where they are initialized to fix this.

Fixes: 5836ebe ("cpuidle: psci: Avoid initializing faux device if no DT idle states are present")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://patch.msgid.link/aDVRcfU8O8sez1x7@stanley.mountain
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Author: Dan Carpenter

drivers/cpuidle/cpuidle-psci.c

@@ -440,14 +440,13 @@ static struct faux_device_ops psci_cpuidle_ops = {
 
 static bool __init dt_idle_state_present(void)
 {
-	struct device_node *cpu_node __free(device_node);
-	struct device_node *state_node __free(device_node);
-
-	cpu_node = of_cpu_device_node_get(cpumask_first(cpu_possible_mask));
+	struct device_node *cpu_node __free(device_node) =
+			of_cpu_device_node_get(cpumask_first(cpu_possible_mask));
 	if (!cpu_node)
 		return false;
 
-	state_node = of_get_cpu_state_node(cpu_node, 0);
+	struct device_node *state_node __free(device_node) =
+			of_get_cpu_state_node(cpu_node, 0);
 	if (!state_node)
 		return false;