PM / devfreq: governors: add GPL module license and allow module build

Add GPL module license and remove the static build
restrictions for building governors. This allows governors now
to be loaded on a need basis and reloaded independently of kernel
build

Cc: Rajagopal Venkat <[e-mail]>
Cc: MyungJoo Ham <[e-mail]>
Cc: Kyungmin Park <[e-mail]>
Cc: "Rafael J. Wysocki" <[e-mail]>
Cc: Kevin Hilman <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]

Signed-off-by: Nishanth Menon <[e-mail]>
Acked-by: MyungJoo Ham <[e-mail]>
Signed-off-by: MyungJoo Ham <[e-mail]>

drivers/devfreq/Kconfig

···
 comment "DEVFREQ Governors"
 
 config DEVFREQ_GOV_SIMPLE_ONDEMAND
-	bool "Simple Ondemand"
+	tristate "Simple Ondemand"
 	help
 	  Chooses frequency based on the recent load on the device. Works
 	  similar as ONDEMAND governor of CPUFREQ does. A device with
···
 	  values to the governor with data field at devfreq_add_device().
 
 config DEVFREQ_GOV_PERFORMANCE
-	bool "Performance"
+	tristate "Performance"
 	help
 	  Sets the frequency at the maximum available frequency.
 	  This governor always returns UINT_MAX as frequency so that
···
 	  at any time.
 
 config DEVFREQ_GOV_POWERSAVE
-	bool "Powersave"
+	tristate "Powersave"
 	help
 	  Sets the frequency at the minimum available frequency.
 	  This governor always returns 0 as frequency so that
···
 	  at any time.
 
 config DEVFREQ_GOV_USERSPACE
-	bool "Userspace"
+	tristate "Userspace"
 	help
 	  Sets the frequency at the user specified one.
 	  This governor returns the user configured frequency if there

drivers/devfreq/governor_performance.c

···
  */
 
 #include <linux/devfreq.h>
+#include <linux/module.h>
 #include "governor.h"
 
 static int devfreq_performance_func(struct devfreq *df,
···
 	return;
 }
 module_exit(devfreq_performance_exit);
+MODULE_LICENSE("GPL");

drivers/devfreq/governor_powersave.c

···
  */
 
 #include <linux/devfreq.h>
+#include <linux/module.h>
 #include "governor.h"
 
 static int devfreq_powersave_func(struct devfreq *df,
···
 	return;
 }
 module_exit(devfreq_powersave_exit);
+MODULE_LICENSE("GPL");

drivers/devfreq/governor_simpleondemand.c

···
  */
 
 #include <linux/errno.h>
+#include <linux/module.h>
 #include <linux/devfreq.h>
 #include <linux/math64.h>
 #include "governor.h"
···
 	return;
 }
 module_exit(devfreq_simple_ondemand_exit);
+MODULE_LICENSE("GPL");

drivers/devfreq/governor_userspace.c

···
 #include <linux/devfreq.h>
 #include <linux/pm.h>
 #include <linux/mutex.h>
+#include <linux/module.h>
 #include "governor.h"
 
 struct userspace_data {
···
 	return;
 }
 module_exit(devfreq_userspace_exit);
+MODULE_LICENSE("GPL");