drm/amdgpu/userq: add UAPI for setting up secure queues

If the queues needs to access TMZ surfaces, it must
be set up as secure.

Reviewed-by: Sunil Khatri <sunil.khatri@amd.com>
Reviewed-by: Jesse.Zhang <Jesse.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>