reproduce (this is a W=1 build):
        # https://github.com/Broadcom/stblinux/commit/1d0d588599345f761ba0da597c552675c6d2e14d
        git remote add broadcom-stblinux https://github.com/Broadcom/stblinux
        git fetch --no-tags broadcom-stblinux next
        git checkout 1d0d588599345f761ba0da597c552675c6d2e14d

        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=$HOME/0day COMPILER=gcc-8.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-8.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash dt_binding_check dtbs_check