[MMC] replace schedule_timeout() with msleep_interruptible()

Use msleep_interruptible() instead of schedule_timeout() to
guarantee the task delays as expected.

Signed-off-by: Nishanth Aravamudan
Signed-off-by: Maximilian Attems

drivers/mmc/mmc.c

@@ -270,8 +270,7 @@ static inline void mmc_delay(unsigned int ms)
 		yield();
 		mdelay(ms);
 	} else {
-		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(ms * HZ / 1000);
+		msleep_interruptible (ms);
 	}
 }