thermal: sysfs: Fix up white space in trip_point_temp_store()

Remove an excess tab character from an otherwise empty code line.

No functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>

drivers/thermal/thermal_sysfs.c

@@ -136,7 +136,7 @@ trip_point_temp_store(struct device *dev, struct device_attribute *attr,
 
 unlock:
 	mutex_unlock(&tz->lock);
-	
+
 	return ret ? ret : count;
 }