cpufreq: pmac32-cpufreq: remove device tree parsing for cpu nodes

Now that the cpu device registration initialises the of_node(if available)
appropriately for all the cpus, parsing here is redundant.

This patch removes DT parsing and uses cpu->of_node instead.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NSudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>

drivers/cpufreq/pmac32-cpufreq.c

@@ -25,6 +25,7 @@
 #include <linux/init.h>
 #include <linux/device.h>
 #include <linux/hardirq.h>
+#include <linux/of_device.h>
 #include <asm/prom.h>
 #include <asm/machdep.h>
 #include <asm/irq.h>
@@ -649,8 +650,8 @@ static int __init pmac_cpufreq_setup(void)
 	if (strstr(cmd_line, "nocpufreq"))
 		return 0;
 
-	/* Assume only one CPU */
-	cpunode = of_find_node_by_type(NULL, "cpu");
+	/* Get first CPU node */
+	cpunode = of_cpu_device_node_get(0);
 	if (!cpunode)
 		goto out;