[BNX2]: Add support for 5709 Serdes.

Add PCI ID and code to support the 5709 Serdes PHY.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 1b0ddbb..840a7e5 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -1924,6 +1924,7 @@
 #define PCI_DEVICE_ID_TIGON3_5752	0x1600
 #define PCI_DEVICE_ID_TIGON3_5752M	0x1601
 #define PCI_DEVICE_ID_NX2_5709		0x1639
+#define PCI_DEVICE_ID_NX2_5709S		0x163a
 #define PCI_DEVICE_ID_TIGON3_5700	0x1644
 #define PCI_DEVICE_ID_TIGON3_5701	0x1645
 #define PCI_DEVICE_ID_TIGON3_5702	0x1646