reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux.git/commit/?id=6146df4b6330e6ec1a1273f77f817bc917548f69
        git remote add dinguyen https://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux.git
        git fetch --no-tags dinguyen socfpga_firmware_for_v7.1
        git checkout 6146df4b6330e6ec1a1273f77f817bc917548f69

        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/firmware/