cpufreq: at32ap: don't declare local variable as static

Earlier commit:
	commit 652ed95d
	Author: Viresh Kumar <viresh.kumar@linaro.org>
	Date:   Thu Jan 9 20:38:43 2014 +0530

	    cpufreq: introduce cpufreq_generic_get() routine

did some changes to driver and by mistake made cpuclk as a 'static' local
variable, which wasn't actually required. Fix it.

Fixes: 652ed95d (cpufreq: introduce cpufreq_generic_get() routine)
Reported-by: NAlexandre Oliva <lxoliva@fsfla.org>
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Acked-by: NHans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: 3.14+ <stable@vger.kernel.org> # 3.14+
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/at32ap-cpufreq.c

@@ -52,7 +52,7 @@ static int at32_set_target(struct cpufreq_policy *policy, unsigned int index)
 static int at32_cpufreq_driver_init(struct cpufreq_policy *policy)
 {
 	unsigned int frequency, rate, min_freq;
-	static struct clk *cpuclk;
+	struct clk *cpuclk;
 	int retval, steps, i;
 
 	if (policy->cpu != 0)