mpc83xx: initialize serdes for MPC837xEMDS boards

This patch is stolen from Anton Vorontsov's patch
for mpc837xerdb boards.

The reference clk and xcorevdd voltage of serdes1/2
is same between mpc837xemds and mpc837xerdb.

8377E: LYNX1- 2 SATA	LYNX2- 2 PCIE
8378E: LYNX1- 2 SGMII	LYNX2- 2 PCIE
8379E: LYNX1- 2 SATA	LYNX2- 2 SATA

Signed-off-by: Dave Liu <daveliu@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/include/configs/MPC837XEMDS.h b/include/configs/MPC837XEMDS.h
index b307bf7..4006026 100644
--- a/include/configs/MPC837XEMDS.h
+++ b/include/configs/MPC837XEMDS.h
@@ -389,6 +389,11 @@
 /* Options are: TSEC[0-1] */
 #define CONFIG_ETHPRIME		"eTSEC1"
 
+/* SERDES */
+#define CONFIG_FSL_SERDES
+#define CONFIG_FSL_SERDES1	0xe3000
+#define CONFIG_FSL_SERDES2	0xe3100
+
 /*
  * Environment
  */