thermal: core: Drop redundant thermal instance checks

Because the trip and cdev pointers are sufficient to identify a thermal
instance holding them unambiguously, drop the additional thermal zone
checks from two loops walking the list of thermal instances in a
thermal zone.

No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://patch.msgid.link/10527734.nUPlyArG6x@rjwysocki.net

drivers/thermal/thermal_core.c

@@ -858,7 +858,7 @@ int thermal_bind_cdev_to_trip(struct thermal_zone_device *tz,
 	mutex_lock(&tz->lock);
 	mutex_lock(&cdev->lock);
 	list_for_each_entry(pos, &tz->thermal_instances, tz_node)
-		if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
+		if (pos->trip == trip && pos->cdev == cdev) {
 			result = -EEXIST;
 			break;
 		}
@@ -923,7 +923,7 @@ int thermal_unbind_cdev_from_trip(struct thermal_zone_device *tz,
 	mutex_lock(&tz->lock);
 	mutex_lock(&cdev->lock);
 	list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) {
-		if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
+		if (pos->trip == trip && pos->cdev == cdev) {
 			list_del(&pos->tz_node);
 			list_del(&pos->cdev_node);