ata_piix: Add device ID for ICH4-L

ICH4-L is a variant of ICH4 lacking USB2 functionality and with some
different device IDs.

It is documented in Intel specification update 290745-025, currently
at <http://www.intel.com/assets/pdf/specupdate/290745.pdf>, and is
included in the device ID table for piix.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/ata/ata_piix.c

@@ -210,6 +210,8 @@ static const struct pci_device_id piix_pci_tbl[] = {
 	{ 0x8086, 0x248A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
 	/* Intel ICH3 (E7500/1) UDMA 100 */
 	{ 0x8086, 0x248B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+	/* Intel ICH4-L */
+	{ 0x8086, 0x24C1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
 	/* Intel ICH4 (i845GV, i845E, i852, i855) UDMA 100 */
 	{ 0x8086, 0x24CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
 	{ 0x8086, 0x24CB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },