Make: Use unaltered object list for dependency inclusion

It looks like the inclusion of dependency files was broken for all
ramstage objects since the list of those gets processed through the
ramstage-postprocess macro. Fix that by taking the unaltered list
for dependency files.

The output of `make printall` (look for DEPENDENCIES=) shows which
dependency files will be included.

See also:

    commit 79f9010e80
    Author: Patrick Georgi <patrick@georgi-clan.de>
    Date:   Sun Nov 25 14:31:08 2012 +0100

        build system: Add hook to postprocess classes (object lists)

and:

    commit f33e395213
    Author: Patrick Georgi <patrick@georgi-clan.de>
    Date:   Sun Nov 25 17:10:47 2012 +0100

        build system: Split linking into multiple steps

Change-Id: If93b1773c5d53240f98382aab11bf7f5a4649ee8
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/3258
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

Makefile

@@ -242,6 +242,9 @@ $(foreach class,$(classes),$(eval $(class)-srcs:=$(sort $($(class)-srcs))))
 src-to-obj=$(addsuffix .$(1).o, $(basename $(patsubst src/%, $(obj)/%, $($(1)-srcs))))
 $(foreach class,$(classes),$(eval $(class)-objs:=$(call src-to-obj,$(class))))
 
+# Save all objs before processing them (for dependency inclusion)
+originalobjs:=$(foreach var, $(addsuffix -objs,$(classes)), $($(var)))
+
 # Call post-processors if they're defined
 $(foreach class,$(classes),\
 	$(if $(value $(class)-postprocess),$(eval $(call $(class)-postprocess,$($(class)-objs)))))
@@ -273,7 +276,7 @@ $(foreach class,$(classes), \
 foreach-src=$(foreach file,$($(1)-srcs),$(eval $(call $(1)-objs_$(subst .,,$(suffix $(file)))_template,$(subst src/,,$(basename $(file))))))
 $(eval $(foreach class,$(classes),$(call foreach-src,$(class))))
 
-DEPENDENCIES = $(allobjs:.o=.d)
+DEPENDENCIES = $(originalobjs:.o=.d)
 -include $(DEPENDENCIES)
 
 printall: