drm/amdgpu: add workarounds for VCN TMZ issue on CHIP_RAVEN

It is a hardware issue that VCN can't handle a GTT
backing stored TMZ buffer on CHIP_RAVEN series ASIC.

Move such a TMZ buffer to VRAM domain before command
submission as a workaround.

v2:
 - Use patch_cs_in_place callback.

v3:
 - Bail out early if unsecure IBs.

Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Lang Yu <Lang.Yu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org