Revert "mmc: bcm2835: Terminate timeout work synchronously"

The commit 37fefade ("mmc: bcm2835: Terminate timeout work
synchronously") causes lockups in case of hardware timeouts due the
timeout work also calling cancel_delayed_work_sync() on its own.
So revert it.

Fixes: 37fefade ("mmc: bcm2835: Terminate timeout work synchronously")
Cc: stable@vger.kernel.org
Signed-off-by: NStefan Wahren <wahrenst@gmx.net>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/bcm2835.c

@@ -597,7 +597,7 @@ static void bcm2835_finish_request(struct bcm2835_host *host)
 	struct dma_chan *terminate_chan = NULL;
 	struct mmc_request *mrq;
 
-	cancel_delayed_work_sync(&host->timeout_work);
+	cancel_delayed_work(&host->timeout_work);
 
 	mrq = host->mrq;