drm/amdgpu/SRIOV: add navi12 pci id for SRIOV (v2)

Add Navi12 PCI id support.

v2: flag as experimental for now (Alex)

Signed-off-by: Jiange Zhao <Jiange.Zhao@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>