PCI: endpoint: Fix misused goto label

Fix a misused goto label jump since that can result in a memory leak.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Li Chen <[e-mail]>
Signed-off-by: Lorenzo Pieralisi <[e-mail]>
Acked-by: Kishon Vijay Abraham I <[e-mail]>

drivers/pci/endpoint/functions/pci-epf-test.c

···
 		if (!epf_test->dma_supported) {
 			dev_err(dev, "Cannot transfer data using DMA\n");
 			ret = -EINVAL;
-			goto err_map_addr;
+			goto err_dma_map;
 		}
 
 		src_phys_addr = dma_map_single(dma_dev, buf, reg->size,