reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/ambarus/linux-0day/commit/70221f9ff61f8a37513eaf2eae10f14ed70e8f50
        git remote add ambarus https://github.com/ambarus/linux-0day
        git fetch --no-tags ambarus b4/acpm-clk
        git checkout 70221f9ff61f8a37513eaf2eae10f14ed70e8f50
        # 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