dmaengine: dmatest: use dmaengine_terminate_sync() instead

The `dmaengine_terminate_all()` is marked as deprecated, so update the test
with `dmaengine_terminate_sync()` which is the recommended alternative.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/dmatest.c

@@ -810,7 +810,7 @@ static int dmatest_func(void *data)
 
 	/* terminate all transfers on specified channels */
 	if (ret || failed_tests)
-		dmaengine_terminate_all(chan);
+		dmaengine_terminate_sync(chan);
 
 	thread->done = true;
 	wake_up(&thread_wait);
@@ -834,7 +834,7 @@ static void dmatest_cleanup_channel(struct dmatest_chan *dtc)
 	}
 
 	/* terminate all transfers on specified channels */
-	dmaengine_terminate_all(dtc->chan);
+	dmaengine_terminate_sync(dtc->chan);
 
 	kfree(dtc);
 }