dma/timberdale: free_irq() on an error path

There was an error path that skipped the free_irq() step by mistake.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/timb_dma.c

@@ -762,7 +762,7 @@ static int __devinit td_probe(struct platform_device *pdev)
 		if ((i % 2) == pchan->rx) {
 			dev_err(&pdev->dev, "Wrong channel configuration\n");
 			err = -EINVAL;
-			goto err_tasklet_kill;
+			goto err_free_irq;
 		}
 
 		td_chan->chan.device = &td->dma;