Some navy flounder boards do not properly mark harvested
VCN instances.  Fix that here.

v2: use IP versions

Fixes: 1b592d00 ("drm/amdgpu/vcn: remove manual instance setting")
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1743Reviewed-and-tested-by: NGuchun Chen <guchun.chen@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>