mmc: cb710: use to_platform_device()

Use to_platform_device() instead of open-coding it.

Signed-off-by: Geliang Tang <[e-mail]>
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/cb710-mmc.h

···
 
 static inline struct cb710_slot *cb710_mmc_to_slot(struct mmc_host *mmc)
 {
-	struct platform_device *pdev = container_of(mmc_dev(mmc),
-		struct platform_device, dev);
+	struct platform_device *pdev = to_platform_device(mmc_dev(mmc));
 	return cb710_pdev_to_slot(pdev);
 }