drm/amdgpu/swsmu: make sienna cichlid function static

Unused outside of the file.

Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2022-01-12 16:24:17 -05:00
commit 6a8cf6349c