drm/amdgpu: add ta DTM/HDCP print in amdgpu_firmware_info for apu

It needs to add ta DTM/HDCP print to get HDCP/DTM version info when cat
amdgpu_firmware_info

Signed-off-by: Changfeng <Changfeng.Zhu@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>