net: ena: Fix error return code in ena_device_init()

Fix to return a negative error code from the invalid dma width
error handling case instead of 0.
Signed-off-by: NWei Yongjun <weiyj.lk@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/amazon/ena/ena_netdev.c

@@ -2329,6 +2329,7 @@ static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
 	dma_width = ena_com_get_dma_width(ena_dev);
 	if (dma_width < 0) {
 		dev_err(dev, "Invalid dma width value %d", dma_width);
+		rc = dma_width;
 		goto err_mmio_read_less;
 	}