thermal: trip: Drop a redundant check from thermal_zone_set_trip()

After recent changes in the thermal framework, a trip points array is
required for registering a thermal zone that is not tripless, so the
tz->trips pointer in thermal_zone_set_trip() is never NULL and the
check involving it is redundant.  Drop that check.

No functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>

drivers/thermal/thermal_trip.c

@@ -153,9 +153,6 @@ int thermal_zone_set_trip(struct thermal_zone_device *tz, int trip_id,
 	struct thermal_trip t;
 	int ret;
 
-	if (!tz->ops->set_trip_temp && !tz->ops->set_trip_hyst && !tz->trips)
-		return -EINVAL;
-
 	ret = __thermal_zone_get_trip(tz, trip_id, &t);
 	if (ret)
 		return ret;