reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/dlech/linux/commit/0cb0769301d1d72f72e3bcb4ceb437879aec6c86
        git remote add dlech https://github.com/dlech/linux
        git fetch --no-tags dlech iio-add-ext-scan-type-and-ad3780
        git checkout 0cb0769301d1d72f72e3bcb4ceb437879aec6c86
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=alpha olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=alpha SHELL=/bin/bash drivers/iio/adc/