drm/amdgpu/powerplay: add vangogh asic name in smu v11 (v2)

This patch is to add vangogh asic name in smu v11.

v2: drop smu firmware name (N/A for VG)

Signed-off-by: Xiaojian Du <xiaojian.du@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>