[PATCH] drm/amd/display: Fix missing declaration of enable_kernel_vsx()

[kernel test robot]

Hi Christophe,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.9 next-20201016]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Christophe-Leroy/drm-amd-display-Fix-missing-declaration-of-enable_kernel_vsx/20201019-174155
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 7cf726a59435301046250c42131554d9ccc566b8
config: x86_64-randconfig-a015-20201019 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 094e9f4779eb9b5c6a49014f2f80b8cbb833572f)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/33f0ea8bebc4132d957107f55776d8f1e02df928
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Christophe-Leroy/drm-amd-display-Fix-missing-declaration-of-enable_kernel_vsx/20201019-174155
        git checkout 33f0ea8bebc4132d957107f55776d8f1e02df928
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All errors (new ones prefixed by >>):

   In file included from drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/tonga_baco.c:23:
   In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:67:
   In file included from drivers/gpu/drm/amd/amdgpu/../include/dm_pp_interface.h:26:
   In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services_types.h:29:
>> drivers/gpu/drm/amd/amdgpu/../display/dc/os_types.h:36:10: fatal error: 'asm/switch-to.h' file not found
   #include <asm/switch-to.h>
            ^~~~~~~~~~~~~~~~~
   1 error generated.

vim +36 drivers/gpu/drm/amd/amdgpu/../display/dc/os_types.h

    34	
    35	#include <asm/byteorder.h>
  > 36	#include <asm/switch-to.h>
    37	

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