drm/amdgpu: fix limiting AV1 to the first instance on VCN3
The job is not yet initialized here.
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/2037 Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Tested-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com> Signed-off-by: Christian König <christian.koenig@amd.com> Fixes: e6f966f9ab37 ("drm/amdgpu: use job and ib structures directly in CS parsers") Signed-off-by: Alex Deucher <alexander.deucher@amd.com>