dmaengine: mediatek: simplify the return expression of mtk_uart_apdma_runtime_resume()

Simplify the return expression.

Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Link: https://lore.kernel.org/r/20200915032622.1772309-1-liushixin2@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/mediatek/mtk-uart-apdma.c

@@ -624,14 +624,9 @@ static int mtk_uart_apdma_runtime_suspend(struct device *dev)
 
 static int mtk_uart_apdma_runtime_resume(struct device *dev)
 {
-	int ret;
 	struct mtk_uart_apdmadev *mtkd = dev_get_drvdata(dev);
 
-	ret = clk_prepare_enable(mtkd->clk);
-	if (ret)
-		return ret;
-
-	return 0;
+	return clk_prepare_enable(mtkd->clk);
 }
 #endif /* CONFIG_PM */