cpufreq: dt: Include types.h from cpufreq-dt.h

cpufreq-dt.h uses 'bool' data type but doesn't include types.h. It works
fine for now as the files that include cpufreq-dt.h, also include
types.h directly or indirectly.

But, when a file includes cpufreq-dt.h without including types.h, we get
a build error. Avoid such errors by including types.h in cpufreq-dt
itself.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

include/linux/cpufreq-dt.h

@@ -10,6 +10,8 @@
 #ifndef __CPUFREQ_DT_H__
 #define __CPUFREQ_DT_H__
 
+#include <linux/types.h>
+
 struct cpufreq_dt_platform_data {
 	/*
 	 * True when each CPU has its own clock to control its