reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/tobetter/linux/commit/80809145e0b3da448b457a4048c7dcad0a4d24da
        git remote add tobetter https://github.com/tobetter/linux
        git fetch --no-tags tobetter odroid-6.6.y
        git checkout 80809145e0b3da448b457a4048c7dcad0a4d24da
        # 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