thermal: fair_share: use the weight from the thermal instance

The fair share governor is not usable with thermal zones that use the
bind op and don't populate thermal_zone_parameters, the majority of
them.  Now that the weight is in the thermal instance, we can use that
in the fair share governor to allow every thermal zone to trivially use
this governor.  Furthermore, this simplifies the code.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Durgadoss R <durgadoss.r@intel.com>
Reviewed-by: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

drivers/thermal/fair_share.c

@@ -88,24 +88,13 @@ static long get_target_state(struct thermal_zone_device *tz,
  */
 static int fair_share_throttle(struct thermal_zone_device *tz, int trip)
 {
-	const struct thermal_zone_params *tzp;
-	struct thermal_cooling_device *cdev;
 	struct thermal_instance *instance;
-	int i;
 	int cur_trip_level = get_trip_level(tz);
 
-	if (!tz->tzp || !tz->tzp->tbp)
-		return -EINVAL;
+	list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
+		struct thermal_cooling_device *cdev = instance->cdev;
 
-	tzp = tz->tzp;
-
-	for (i = 0; i < tzp->num_tbps; i++) {
-		if (!tzp->tbp[i].cdev)
-			continue;
-
-		cdev = tzp->tbp[i].cdev;
-		instance = get_thermal_instance(tz, cdev, trip);
-		if (!instance)
+		if (instance->trip != trip)
 			continue;
 
 		instance->target = get_target_state(tz, cdev,