reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        git remote add broonie-sound https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
        git fetch broonie-sound for-next
        git checkout broonie-sound/for-next
        b4 shazam https://lore.kernel.org/r/20241010054109.16938-1-krzysztof.kozlowski@linaro.org
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash