drm/amdgpu: enable TMZ option for onwards asic

The TMZ is disabled by default and enable TMZ option
for the IP discovery based asic will help on the TMZ
function verification.

Signed-off-by: Prike Liang <Prike.Liang@amd.com>
Reviewed-by: Aaron Liu <aaron.liu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>