thermal: stm32: simplify getting .driver_data

We should get 'driver_data' from 'struct device' directly. Going via
platform_device is an unneeded step back and forth.

Signed-off-by: Wolfram Sang <[e-mail]>
Reviewed-by: Simon Horman <[e-mail]>
Reviewed-by: Daniel Lezcano <[e-mail]>
Signed-off-by: Eduardo Valentin <[e-mail]>

drivers/thermal/st/stm_thermal.c

···
 static int stm_thermal_suspend(struct device *dev)
 {
 	int ret;
-	struct platform_device *pdev = to_platform_device(dev);
-	struct stm_thermal_sensor *sensor = platform_get_drvdata(pdev);
+	struct stm_thermal_sensor *sensor = dev_get_drvdata(dev);
 
 	ret = stm_thermal_sensor_off(sensor);
 	if (ret)
···
 static int stm_thermal_resume(struct device *dev)
 {
 	int ret;
-	struct platform_device *pdev = to_platform_device(dev);
-	struct stm_thermal_sensor *sensor = platform_get_drvdata(pdev);
+	struct stm_thermal_sensor *sensor = dev_get_drvdata(dev);
 
 	ret = stm_thermal_prepare(sensor);
 	if (ret)