net: sis: Fix a function name in comments

Use dma_alloc_coherent() instead of pci_alloc_consistent(),
because only dma_alloc_coherent() is called here.
Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/sis/sis190.c

@@ -1070,7 +1070,7 @@ static int sis190_open(struct net_device *dev)
 
 	/*
 	 * Rx and Tx descriptors need 256 bytes alignment.
-	 * pci_alloc_consistent() guarantees a stronger alignment.
+	 * dma_alloc_coherent() guarantees a stronger alignment.
 	 */
 	tp->TxDescRing = dma_alloc_coherent(&pdev->dev, TX_RING_BYTES,
 					    &tp->tx_dma, GFP_KERNEL);