reproduce (this is a W=1 build):
        # https://github.com/thesofproject/linux/commit/ec69dd1e9c24d7b84073055d0fd87c436919a6b0
        git remote add thesofproject https://github.com/thesofproject/linux
        git fetch --no-tags thesofproject topic/sof-dev
        git checkout ec69dd1e9c24d7b84073055d0fd87c436919a6b0

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash sound/soc/sof/amd/