drm/amdgpu: Bypass display ta if display hw is not available

Do not load/invoke display TA if display hardware
is not available.

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1 file changed