ColdFire: update r5200 platform for MCF52x2

Signed-off-by: TsiChungLiew <Tsi-Chung.Liew@freescale.com>
diff --git a/board/r5200/Makefile b/board/r5200/Makefile
index 424ab1c..2ec71ee 100644
--- a/board/r5200/Makefile
+++ b/board/r5200/Makefile
@@ -25,7 +25,7 @@
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	= $(BOARD).o
+COBJS	= $(BOARD).o mii.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))