dmaengine: fsl-qdma: Remove a useless devm_kfree()

'status_head' is a managed resource. It will be freed automatically if
fsl_qdma_prep_status_queue(), and so fsl_qdma_probe(), fails.

Remove the redundant (and harmless) devm_kfree() call.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/6b7f60aa2b92f73b35c586886daffc1a5ac58697.1704621515.git.christophe.jaillet@wanadoo.frSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/fsl-qdma.c

@@ -568,10 +568,9 @@ static struct fsl_qdma_queue
 					      status_size,
 					      &status_head->bus_addr,
 					      GFP_KERNEL);
-	if (!status_head->cq) {
-		devm_kfree(&pdev->dev, status_head);
+	if (!status_head->cq)
 		return NULL;
-	}
+
 	status_head->n_cq = status_size;
 	status_head->virt_head = status_head->cq;
 	status_head->virt_tail = status_head->cq;