[freescale-fslc:pr/225 99/432] undefined reference to `linflex_string_write'

[freescale-fslc:pr/225 99/432] undefined reference to `linflex_string_write'

[kernel test robot]

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tree:   https://github.com/Freescale/linux-fslc pr/225
head:   ab134276e5fa0f228a300c61bed6c8b61a17393b
commit: 556dd13c952bd150418feecfaa178edacb89d511 [99/432] LF-631-7 tty: serial: linflexuart: Add support for FIFO with DMA
config: parisc-randconfig-r012-20210122 (attached as .config)
compiler: hppa-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/Freescale/linux-fslc/commit/556dd13c952bd150418feecfaa178edacb89d511
        git remote add freescale-fslc https://github.com/Freescale/linux-fslc
        git fetch --no-tags freescale-fslc pr/225
        git checkout 556dd13c952bd150418feecfaa178edacb89d511
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   hppa-linux-ld: drivers/tty/serial/fsl_linflexuart.o: in function `linflex_set_termios':
>> (.text+0x4bc): undefined reference to `linflex_string_write'

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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