rk: arm64: support build boot.img

Change-Id: Iaf50be16e321b13bbe45b9beb335d542e00507cf
Signed-off-by: Tao Huang <[email protected]>

Author: rkhuangtao

.gitignore

@@ -42,6 +42,7 @@ Module.symvers
 #
 # Top-level generic files
 #
+/boot.img
 /kernel.img
 /resource.img
 /tags

arch/arm64/Makefile

@@ -177,3 +177,6 @@ LOGO_KERNEL := $(notdir $(wildcard $(srctree)/logo_kernel.bmp))
 	$(Q) if [ -f $(srctree)/$(LOGO_KERNEL) -a "$(srctree)" != "$(objtree)" ]; then cp -a $(srctree)/$(LOGO_KERNEL) $(objtree)/; fi
 	$(Q)$(srctree)/scripts/resource_tool $(objtree)/arch/arm64/boot/dts/rockchip/$*.dtb $(LOGO) $(LOGO_KERNEL)
 	@echo '  Image:  resource.img (with $*.dtb $(LOGO) $(LOGO_KERNEL)) is ready'
+	$(Q) if [ -x $(srctree)/scripts/mkbootimg ]; then $(srctree)/scripts/mkbootimg --kernel $(objtree)/arch/arm64/boot/Image --second resource.img -o boot.img && echo '  Image:  boot.img (with Image resource.img) is ready'; fi
+
+CLEAN_FILES += boot.img kernel.img resource.img