WorkStruct: make allyesconfig

Fix up for make allyesconfig.

Signed-Off-By: David Howells <dhowells@redhat.com>
diff --git a/drivers/mmc/mmc.h b/drivers/mmc/mmc.h
index cd5e0ab..149affe 100644
--- a/drivers/mmc/mmc.h
+++ b/drivers/mmc/mmc.h
@@ -20,6 +20,6 @@
 void mmc_free_host_sysfs(struct mmc_host *host);
 
 int mmc_schedule_work(struct work_struct *work);
-int mmc_schedule_delayed_work(struct work_struct *work, unsigned long delay);
+int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay);
 void mmc_flush_scheduled_work(void);
 #endif