dmaengine: imx-sdma: return proper error if kzalloc fails

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/imx-sdma.c

@@ -1281,8 +1281,10 @@ static int __init sdma_probe(struct platform_device *pdev)
 		goto err_request_irq;
 
 	sdma->script_addrs = kzalloc(sizeof(*sdma->script_addrs), GFP_KERNEL);
-	if (!sdma->script_addrs)
+	if (!sdma->script_addrs) {
+		ret = -ENOMEM;
 		goto err_alloc;
+	}
 
 	sdma->version = pdata->sdma_version;