thermal: fix ptr_ret.cocci warnings

drivers/thermal/tango_thermal.c:86:1-3: WARNING: PTR_ERR_OR_ZERO can be used

 Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR

Generated by: scripts/coccinelle/api/ptr_ret.cocci

CC: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

drivers/thermal/tango_thermal.c

@@ -83,10 +83,7 @@ static int tango_thermal_probe(struct platform_device *pdev)
 	writel(CMD_ON, priv->base + TEMPSI_CMD);
 
 	tzdev = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, priv, &ops);
-	if (IS_ERR(tzdev))
-		return PTR_ERR(tzdev);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(tzdev);
 }
 
 static const struct of_device_id tango_sensor_ids[] = {