drm/amdgpu: enable tmz on yellow carp

The tmz functions are verified on yellow carp. So enable it by
default.

Signed-off-by: Aaron Liu <aaron.liu@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>