reproduce:
        # https://github.com/frank-w/BPI-R2-4.14/commit/9775a230703aed4ca384dfe8d9a1df84f62ffc96
        git remote add frank-w-bpi-r2-4.14 https://github.com/frank-w/BPI-R2-4.14
        git fetch --no-tags frank-w-bpi-r2-4.14 7.3-rc
        git checkout 9775a230703aed4ca384dfe8d9a1df84f62ffc96
        # choose either of the following two methods to reproduce the issue
        # 1. reproduce by kismet
           # install kmax per https://github.com/paulgazz/kmax/blob/master/README.md
           kismet --linux-ksrc=linux --selectees CONFIG_FWNODE_PCS --selectors CONFIG_PCS_MTK_USXGMII -a=hexagon
        # 2. reproduce by make
           cd linux
           # download the config file from the "config:" link in the report, and save it as .config
           make ARCH=hexagon olddefconfig