reproduce (this is a W=1 build):
        # https://github.com/lunn/linux/commit/9a48ae1a616c32799d10fcde6a9eea1bbade8496
        git remote add lunn https://github.com/lunn/linux.git
        git fetch --no-tags lunn v6.7-rc6-net-next-mv88e6xxx-leds-v3
        git checkout 9a48ae1a616c32799d10fcde6a9eea1bbade8496
        # 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/dsa/qca/