openrisc: Use common of_get_cpu_node() instead of open-coding

The common of_get_cpu_node() is equivalent to setup_find_cpu_node(), so
use it instead.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stafford Horne <shorne@gmail.com>

arch/openrisc/kernel/setup.c

@@ -152,21 +152,6 @@ static void print_cpuinfo(void)
 		printk(KERN_INFO "-- custom unit(s)\n");
 }
 
-static struct device_node *setup_find_cpu_node(int cpu)
-{
-	u32 hwid;
-	struct device_node *cpun;
-
-	for_each_of_cpu_node(cpun) {
-		if (of_property_read_u32(cpun, "reg", &hwid))
-			continue;
-		if (hwid == cpu)
-			return cpun;
-	}
-
-	return NULL;
-}
-
 void __init setup_cpuinfo(void)
 {
 	struct device_node *cpu;
@@ -175,7 +160,7 @@ void __init setup_cpuinfo(void)
 	int cpu_id = smp_processor_id();
 	struct cpuinfo_or1k *cpuinfo = &cpuinfo_or1k[cpu_id];
 
-	cpu = setup_find_cpu_node(cpu_id);
+	cpu = of_get_cpu_node(cpu_id, NULL);
 	if (!cpu)
 		panic("Couldn't find CPU%d in device tree...\n", cpu_id);
 
@@ -255,7 +240,7 @@ static inline unsigned long extract_value(unsigned long reg, unsigned long mask)
 void calibrate_delay(void)
 {
 	const int *val;
-	struct device_node *cpu = setup_find_cpu_node(smp_processor_id());
+	struct device_node *cpu = of_get_cpu_node(smp_processor_id(), NULL);
 
 	val = of_get_property(cpu, "clock-frequency", NULL);
 	if (!val)