tg3: Add 5717 serdes phy ID

The serdes and copper phys of the 5717 asic rev have different phy IDs.
This patch adds the serdes phy ID.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Reviewed-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index adb579f..4a65347 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -14170,7 +14170,8 @@
 	case PHY_ID_BCM5756:	return "5722/5756";
 	case PHY_ID_BCM5906:	return "5906";
 	case PHY_ID_BCM5761:	return "5761";
-	case PHY_ID_BCM5717:	return "5717";
+	case PHY_ID_BCM5718C:	return "5718C";
+	case PHY_ID_BCM5718S:	return "5718S";
 	case PHY_ID_BCM8002:	return "8002/serdes";
 	case 0:			return "serdes";
 	default:		return "unknown";