nvidia-cbootimage: integrate into coreboot make

Add rules for building the nvidia-cbootimage utility and add dependencies
to the tegra124 platform.

Change-Id: Ia9f26981bccd217fe79e1b5dd432ee7da868d22a
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6851
Reviewed-by: Aaron Durbin <adurbin@google.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
diff --git a/src/soc/nvidia/tegra124/Makefile.inc b/src/soc/nvidia/tegra124/Makefile.inc
index a63eb35..b1f5998 100644
--- a/src/soc/nvidia/tegra124/Makefile.inc
+++ b/src/soc/nvidia/tegra124/Makefile.inc
@@ -1,5 +1,3 @@
-CBOOTIMAGE = cbootimage
-
 bootblock-y += bootblock.c
 bootblock-y += bootblock_asm.S
 bootblock-y += cbfs.c
@@ -40,13 +38,13 @@
 $(objcbfs)/bootblock.raw.elf: $(objcbfs)/bootblock.elf
 	cp $< $@
 
-$(obj)/generated/bct.bin: $(obj)/generated/bct.cfg
+$(obj)/generated/bct.bin: $(obj)/generated/bct.cfg $(CBOOTIMAGE)
 	@printf "    CBOOTIMAGE $(subst $(obj)/,,$(@))\n"
 	$(CBOOTIMAGE) -gbct --soc tegra124 $< $@
 
 BCT_BIN = $(obj)/generated/bct.bin
 BCT_WRAPPER = $(obj)/generated/bct.wrapper
-$(objcbfs)/bootblock.bin: $(objcbfs)/bootblock.raw.bin $(BCT_BIN)
+$(objcbfs)/bootblock.bin: $(objcbfs)/bootblock.raw.bin $(BCT_BIN) $(CBOOTIMAGE)
 	echo "Version    = 1;" > $(BCT_WRAPPER)
 	echo "Redundancy = 1;" >> $(BCT_WRAPPER)
 	echo "Bctfile    = $(BCT_BIN);" >> $(BCT_WRAPPER)