[PATCH] fix m68knommu/68VZ328 Makefile to traverse sub-dirs

Fix m68knommu 68VZ328 Makefile to only traverse its sub-directories.
There is no local code files for it to compile.

arch/m68knommu/platform/68VZ328/Makefile

@@ -2,11 +2,5 @@
 # Makefile for arch/m68knommu/platform/68VZ328.
 #
 
-obj-y := $(BOARD)/config.o
-
-EXTRA_TARGETS := $(BOARD)/bootlogo.rh $(BOARD)/crt0_$(MODEL).o
-
-$(obj)/$(BOARD)/bootlogo.rh: $(src)/../68EZ328/bootlogo.h
-	perl $(src)/../68328/bootlogo.pl < $(src)/../68EZ328/bootlogo.h \
-		> $(obj)/$(BOARD)/bootlogo.rh
+obj-y := $(BOARD)/