reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/morimoto/linux/commit/ad1349eda3c8e174887cff500cf17d1b02b192d7
        git remote add morimoto https://github.com/morimoto/linux
        git fetch --no-tags morimoto sound-ak4619-for-upstream-2024-06-28
        git checkout ad1349eda3c8e174887cff500cf17d1b02b192d7
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=csky olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=csky SHELL=/bin/bash dtbs_check