#define PHY_ID_KSZ9021 0x00221610
#define PHY_ID_KS8737 0x00221720
#define PHY_ID_KSZ8021 0x00221555
+#define PHY_ID_KSZ8031 0x00221556
#define PHY_ID_KSZ8041 0x00221510
#define PHY_ID_KSZ8051 0x00221550
/* same id: ks8001 Rev. A/B, and ks8721 Rev 3. */