reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/shenki/linux/commit/867a6cd8ea2c0514739e75bc2701687f294c2578
        git remote add shenki https://github.com/shenki/linux
        git fetch --no-tags shenki aspeed-6.9-rebase
        git checkout 867a6cd8ea2c0514739e75bc2701687f294c2578
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=microblaze olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=microblaze SHELL=/bin/bash drivers/soc/aspeed/rvas/