platform: make better use of to_platform_{device,driver}() macros

This helps the code look more consistent and cleaner.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 349a101..62a8768 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -603,9 +603,8 @@
  */
 static int platform_match(struct device *dev, struct device_driver *drv)
 {
-	struct platform_device *pdev;
+	struct platform_device *pdev = to_platform_device(dev);
 
-	pdev = container_of(dev, struct platform_device, dev);
 	return (strcmp(pdev->name, drv->name) == 0);
 }
 
@@ -623,26 +622,24 @@
 
 static int platform_legacy_suspend_late(struct device *dev, pm_message_t mesg)
 {
-	struct platform_driver *drv = to_platform_driver(dev->driver);
-	struct platform_device *pdev;
+	struct platform_driver *pdrv = to_platform_driver(dev->driver);
+	struct platform_device *pdev = to_platform_device(dev);
 	int ret = 0;
 
-	pdev = container_of(dev, struct platform_device, dev);
-	if (dev->driver && drv->suspend_late)
-		ret = drv->suspend_late(pdev, mesg);
+	if (dev->driver && pdrv->suspend_late)
+		ret = pdrv->suspend_late(pdev, mesg);
 
 	return ret;
 }
 
 static int platform_legacy_resume_early(struct device *dev)
 {
-	struct platform_driver *drv = to_platform_driver(dev->driver);
-	struct platform_device *pdev;
+	struct platform_driver *pdrv = to_platform_driver(dev->driver);
+	struct platform_device *pdev = to_platform_device(dev);
 	int ret = 0;
 
-	pdev = container_of(dev, struct platform_device, dev);
-	if (dev->driver && drv->resume_early)
-		ret = drv->resume_early(pdev);
+	if (dev->driver && pdrv->resume_early)
+		ret = pdrv->resume_early(pdev);
 
 	return ret;
 }