powerpc/t208x: some update to support t2081

- fix serdes definition for t2081.
- fix clock speed for t2081.
- update ids, as CONFIG_FSL_SATA_V2 is needed only for t2080,
  T2081 has no SATA.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/arch/powerpc/cpu/mpc85xx/t2080_ids.c b/arch/powerpc/cpu/mpc85xx/t2080_ids.c
index 068e1f2..0bfd447 100644
--- a/arch/powerpc/cpu/mpc85xx/t2080_ids.c
+++ b/arch/powerpc/cpu/mpc85xx/t2080_ids.c
@@ -53,8 +53,10 @@
 	SET_USB_LIODN(1, "fsl-usb2-mph", 553),
 	SET_USB_LIODN(2, "fsl-usb2-dr", 554),
 
+#ifdef CONFIG_FSL_SATA_V2
 	SET_SATA_LIODN(1, 555),
 	SET_SATA_LIODN(2, 556),
+#endif
 
 	SET_PCI_LIODN_BASE(CONFIG_SYS_FSL_PCIE_COMPAT, 1, 148),
 	SET_PCI_LIODN_BASE(CONFIG_SYS_FSL_PCIE_COMPAT, 2, 228),