86xx: Convert sbc8641d to use libfdt.

This is the proper fix for a missing closing brace in the function
ft_cpu_setup() noticed by joe.hamman <at> embeddedspecialties.com.
The ft_cpu_setup() function in mpc8641hpcn.c should have been
removed earlier as it was under the obsolete CONFIG_OF_FLAT_TREE,
but was missed.  Only, the sbc8641d was nominally still using it.
It all got ripped out, and the funcality that was in ft_board_setup()
was refactored to remove the CPU portions into the new file
cpu/mpc86xx/fdt.c instead.  Make sbc8641d use this now.

Based loosely on an original patch from joe.hamman@embeddedspecialties.com

Signed-off-by: Jon Loeliger <jdl@freescale.com>
diff --git a/cpu/mpc86xx/Makefile b/cpu/mpc86xx/Makefile
index 6d9300e..537f62a 100644
--- a/cpu/mpc86xx/Makefile
+++ b/cpu/mpc86xx/Makefile
@@ -28,13 +28,20 @@
 
 LIB	= $(obj)lib$(CPU).a
 
-START	= start.o #resetvec.o
+START	= start.o
 SOBJS	= cache.o
-COBJS	= traps.o cpu.o cpu_init.o speed.o interrupts.o \
-	  spd_sdram.o
+
+COBJS-y	+= traps.o
+COBJS-y	+= cpu.o
+COBJS-y	+= cpu_init.o
+COBJS-y	+= speed.o
+COBJS-y	+= interrupts.o
+COBJS-y	+= spd_sdram.o
+
+COBJS-$(CONFIG_OF_LIBFDT) += fdt.o
 
-SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
+OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS-y))
 START	:= $(addprefix $(obj),$(START))
 
 all:	$(obj).depend $(START) $(LIB)