thermal: qoriq: Don't store struct thermal_zone_device reference

Struct thermal_zone_device reference stored as sensor's private data
isn't really used anywhere in the code. Drop it.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Tested-by: Lucas Stach <l.stach@pengutronix.de>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Angus Ainslie (Purism) <angus@akkea.ca>
Cc: linux-imx@nxp.com
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20191210164153.10463-3-andrew.smirnov@gmail.com

drivers/thermal/qoriq_thermal.c

@@ -110,7 +110,6 @@ struct qoriq_tmu_data;
  * Thermal zone data
  */
 struct qoriq_sensor {
-	struct thermal_zone_device	*tzd;
 	struct qoriq_tmu_data		*qdata;
 	int				id;
 };
@@ -162,6 +161,9 @@ static int qoriq_tmu_register_tmu_zone(struct platform_device *pdev)
 	int id, sites = 0;
 
 	for (id = 0; id < SITES_MAX; id++) {
+		struct thermal_zone_device *tzd;
+		int ret;
+
 		qdata->sensor[id] = devm_kzalloc(&pdev->dev,
 				sizeof(struct qoriq_sensor), GFP_KERNEL);
 		if (!qdata->sensor[id])
@@ -169,13 +171,16 @@ static int qoriq_tmu_register_tmu_zone(struct platform_device *pdev)
 
 		qdata->sensor[id]->id = id;
 		qdata->sensor[id]->qdata = qdata;
-		qdata->sensor[id]->tzd = devm_thermal_zone_of_sensor_register(
-				&pdev->dev, id, qdata->sensor[id], &tmu_tz_ops);
-		if (IS_ERR(qdata->sensor[id]->tzd)) {
-			if (PTR_ERR(qdata->sensor[id]->tzd) == -ENODEV)
+
+		tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, id,
+							   qdata->sensor[id],
+							   &tmu_tz_ops);
+		ret = PTR_ERR_OR_ZERO(tzd);
+		if (ret) {
+			if (ret == -ENODEV)
 				continue;
 			else
-				return PTR_ERR(qdata->sensor[id]->tzd);
+				return ret;
 		}
 
 		if (qdata->ver == TMU_VER1)