reproduce (this is a W=1 build):
        # https://github.com/rogerq/linux/commit/8ba5217a2987d80532ab08449a7f6141d0e78298
        git remote add rogerq https://github.com/rogerq/linux
        git fetch --no-tags rogerq b4/am65-cpsw-multi-rx
        git checkout 8ba5217a2987d80532ab08449a7f6141d0e78298
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/net/