reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/morimoto/linux/commit/0faf0dea698a7c49a86395da5d30138a618e54c4
        git remote add morimoto https://github.com/morimoto/linux
        git fetch --no-tags morimoto renesas-bsp/v6.1-dev
        git checkout 0faf0dea698a7c49a86395da5d30138a618e54c4
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash dtbs_check