image.mk: add a fit recipe

Add a recipe to build a fit wrapped kernel (and optional dtb).

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 46600

include/image.mk

@@ -308,6 +308,16 @@ define Build/netgear-chk
 	mv $@.new $@
 endef
 
+define Build/fit
+	$(TOPDIR)/scripts/mkits.sh \
+		-D $(DEVICE_NAME) -o $@.its -k $@ \
+		$(if $(word 2,$(1)),-d $(word 2,$(1))) -C $(word 1,$(1)) \
+		-a $(KERNEL_LOADADDR) -e $(if $(KERNEL_ENTRY),$(KERNEL_ENTRY),$(KERNEL_LOADADDR)) \
+		-A $(ARCH) -v $(LINUX_VERSION)
+	PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage -f $@.its $@.new
+	@mv $@.new $@
+endef
+
 define Build/lzma
 	$(STAGING_DIR_HOST)/bin/lzma e $@ -lc1 -lp2 -pb2 $(1) $@.new
 	@mv $@.new $@