cpufreq: export cpufreq_driver_resolve_freq()

Export cpufreq_driver_resolve_freq() since governors may be compiled as
modules.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Steve Muckle <smuckle@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/cpufreq.c

@@ -522,6 +522,7 @@ unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
 
 	return target_freq;
 }
+EXPORT_SYMBOL_GPL(cpufreq_driver_resolve_freq);
 
 /*********************************************************************
  *                          SYSFS INTERFACE                          *