[libata sata_mv] fix build

This function will go away when pci_intx() finally makes it
into the core PCI layer.

drivers/scsi/sata_mv.c

@@ -699,6 +699,22 @@ static int mv_host_init(struct ata_probe_ent *probe_ent)
 	return rc;
 }
 
+/* move to PCI layer, integrate w/ MSI stuff */
+static void pci_intx(struct pci_dev *pdev, int enable)
+{
+	u16 pci_command, new;
+
+	pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
+
+	if (enable)
+		new = pci_command & ~PCI_COMMAND_INTX_DISABLE;
+	else
+		new = pci_command | PCI_COMMAND_INTX_DISABLE;
+
+	if (new != pci_command)
+		pci_write_config_word(pdev, PCI_COMMAND, pci_command);
+}
+
 static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	static int printed_version = 0;