thermal/of: Unexport unused OF functions

The functions thermal_of_zone_register() and
thermal_of_zone_unregister() are no longer needed from the drivers as
the devm_ variant is always used.

Make them static in the C file and remove their declaration from thermal.h
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230404075138.2914680-2-daniel.lezcano@linaro.org

drivers/thermal/thermal_of.c

@@ -439,7 +439,7 @@ static int thermal_of_unbind(struct thermal_zone_device *tz,
  *
  * @tz: a pointer to the thermal zone structure
  */
-void thermal_of_zone_unregister(struct thermal_zone_device *tz)
+static void thermal_of_zone_unregister(struct thermal_zone_device *tz)
 {
 	struct thermal_trip *trips = tz->trips;
 	struct thermal_zone_params *tzp = tz->tzp;
@@ -451,7 +451,6 @@ void thermal_of_zone_unregister(struct thermal_zone_device *tz)
 	kfree(tzp);
 	kfree(ops);
 }
-EXPORT_SYMBOL_GPL(thermal_of_zone_unregister);
 
 /**
  * thermal_of_zone_register - Register a thermal zone with device node
@@ -473,8 +472,8 @@ EXPORT_SYMBOL_GPL(thermal_of_zone_unregister);
  *	- ENOMEM: if one structure can not be allocated
  *	- Other negative errors are returned by the underlying called functions
  */
-struct thermal_zone_device *thermal_of_zone_register(struct device_node *sensor, int id, void *data,
-						     const struct thermal_zone_device_ops *ops)
+static struct thermal_zone_device *thermal_of_zone_register(struct device_node *sensor, int id, void *data,
+							    const struct thermal_zone_device_ops *ops)
 {
 	struct thermal_zone_device *tz;
 	struct thermal_trip *trips;
@@ -550,7 +549,6 @@ struct thermal_zone_device *thermal_of_zone_register(struct device_node *sensor,
 
 	return ERR_PTR(ret);
 }
-EXPORT_SYMBOL_GPL(thermal_of_zone_register);
 
 static void devm_thermal_of_zone_release(struct device *dev, void *res)
 {

include/linux/thermal.h

@@ -259,25 +259,12 @@ struct thermal_zone_params {
 
 /* Function declarations */
 #ifdef CONFIG_THERMAL_OF
-struct thermal_zone_device *thermal_of_zone_register(struct device_node *sensor, int id, void *data,
-						     const struct thermal_zone_device_ops *ops);
-
 struct thermal_zone_device *devm_thermal_of_zone_register(struct device *dev, int id, void *data,
 							  const struct thermal_zone_device_ops *ops);
 
-void thermal_of_zone_unregister(struct thermal_zone_device *tz);
-
 void devm_thermal_of_zone_unregister(struct device *dev, struct thermal_zone_device *tz);
 
-void thermal_of_zone_unregister(struct thermal_zone_device *tz);
-
 #else
-static inline
-struct thermal_zone_device *thermal_of_zone_register(struct device_node *sensor, int id, void *data,
-						     const struct thermal_zone_device_ops *ops)
-{
-	return ERR_PTR(-ENOTSUPP);
-}
 
 static inline
 struct thermal_zone_device *devm_thermal_of_zone_register(struct device *dev, int id, void *data,
@@ -286,10 +273,6 @@ struct thermal_zone_device *devm_thermal_of_zone_register(struct device *dev, in
 	return ERR_PTR(-ENOTSUPP);
 }
 
-static inline void thermal_of_zone_unregister(struct thermal_zone_device *tz)
-{
-}
-
 static inline void devm_thermal_of_zone_unregister(struct device *dev,
 						   struct thermal_zone_device *tz)
 {