dmaengine: dma-jz4780: add missed clk_disable_unprepare in remove

The remove misses to disable and unprepare jzdma->clk.
Add a call to clk_disable_unprepare to fix it.
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Acked-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20191104161622.11758-1-hslester96@gmail.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/dma-jz4780.c

@@ -981,6 +981,7 @@ static int jz4780_dma_remove(struct platform_device *pdev)
 
 	of_dma_controller_free(pdev->dev.of_node);
 
+	clk_disable_unprepare(jzdma->clk);
 	free_irq(jzdma->irq, jzdma);
 
 	for (i = 0; i < jzdma->soc_data->nb_channels; i++)