reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/krzk/linux/commit/fcc37ff0732f38ecd89c97becc32f422d6aa9f6f
        git remote add krzk-github https://github.com/krzk/linux
        git fetch --no-tags krzk-github b4/pinctrl-const-desc
        git checkout fcc37ff0732f38ecd89c97becc32f422d6aa9f6f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/pinctrl/