thermal: rockchip_thermal: 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 <wsa+renesas@sang-engineering.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

drivers/thermal/rockchip_thermal.c

@@ -1327,8 +1327,7 @@ static int rockchip_thermal_remove(struct platform_device *pdev)
 
 static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
+	struct rockchip_thermal_data *thermal = dev_get_drvdata(dev);
 	int i;
 
 	for (i = 0; i < thermal->chip->chn_num; i++)
@@ -1346,8 +1345,7 @@ static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
 
 static int __maybe_unused rockchip_thermal_resume(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
+	struct rockchip_thermal_data *thermal = dev_get_drvdata(dev);
 	int i;
 	int error;
 
@@ -1376,7 +1374,7 @@ static int __maybe_unused rockchip_thermal_resume(struct device *dev)
 					      id, thermal->regs,
 					      thermal->tshut_temp);
 		if (error)
-			dev_err(&pdev->dev, "%s: invalid tshut=%d, error=%d\n",
+			dev_err(dev, "%s: invalid tshut=%d, error=%d\n",
 				__func__, thermal->tshut_temp, error);
 	}