reproduce:
        # https://github.com/lunn/linux/commit/50afa47989f1c88bb4fd40424e3aa38bd6cd4e66
        git remote add lunn https://github.com/lunn/linux.git
        git fetch --no-tags lunn v6.8-rc1-net-next-mv88e6xxx-leds-v4
        git checkout 50afa47989f1c88bb4fd40424e3aa38bd6cd4e66
        # 1. reproduce by kismet
           # install kmax per https://github.com/paulgazz/kmax/blob/master/README.md
           kismet --linux-ksrc=linux --selectees CONFIG_NETDEV_LEDS --selectors CONFIG_NET_DSA_MV88E6XXX -a=alpha
        # 2. reproduce by make
           # save the config file to linux source tree
           cd linux
           make ARCH=alpha olddefconfig