move Blackfin cpu object list to respective cpu directories

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/cpu/bf537/Makefile b/cpu/bf537/Makefile
index 8b0f9c0..06d1aae 100644
--- a/cpu/bf537/Makefile
+++ b/cpu/bf537/Makefile
@@ -28,12 +28,12 @@
 
 LIB	= $(obj)lib$(CPU).a
 
-START	= start.o start1.o interrupt.o cache.o flush.o init_sdram.o
+SOBJS	= start.o start1.o interrupt.o cache.o flush.o init_sdram.o
 COBJS	= cpu.o traps.o ints.o serial.o interrupts.o video.o i2c.o
 
 EXTRA = init_sdram_bootrom_initblock.o
 
-SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS) $(SOBJS))
 START	:= $(addprefix $(obj),$(START))