mmc: sh_mmcif: use to_delayed_work

Use to_delayed_work() instead of open-coding it.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 6234eab3..8d870ce 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -1395,7 +1395,7 @@
 
 static void sh_mmcif_timeout_work(struct work_struct *work)
 {
-	struct delayed_work *d = container_of(work, struct delayed_work, work);
+	struct delayed_work *d = to_delayed_work(work);
 	struct sh_mmcif_host *host = container_of(d, struct sh_mmcif_host, timeout_work);
 	struct mmc_request *mrq = host->mrq;
 	struct device *dev = sh_mmcif_host_to_dev(host);