mtd: don't use flush_scheduled_work()

flush_scheduled_work() is deprecated and scheduled to be removed.
Directly flush cxt->work_{erase|write} on removal instead.
Signed-off-by: NTejun Heo <tj@kernel.org>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/mtdoops.c

@@ -396,7 +396,8 @@ static void mtdoops_notify_remove(struct mtd_info *mtd)
 		printk(KERN_WARNING "mtdoops: could not unregister kmsg_dumper\n");
 
 	cxt->mtd = NULL;
-	flush_scheduled_work();
+	flush_work_sync(&cxt->work_erase);
+	flush_work_sync(&cxt->work_write);
 }