83xx: serdes setup routines

This patch adds few routines to configure serdes on 837x targets.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
diff --git a/cpu/mpc83xx/Makefile b/cpu/mpc83xx/Makefile
index 7ad7e3e..fcb6a52 100644
--- a/cpu/mpc83xx/Makefile
+++ b/cpu/mpc83xx/Makefile
@@ -37,6 +37,7 @@
 COBJS-y += spd_sdram.o
 COBJS-y += ecc.o
 COBJS-$(CONFIG_QE) += qe_io.o
+COBJS-$(CONFIG_FSL_SERDES) += serdes.o
 COBJS-$(CONFIG_83XX_GENERIC_PCI) += pci.o
 COBJS-$(CONFIG_OF_LIBFDT) += fdt.o