drm/amdgpu: Add flags to distinguish vf/pf/pt mode

Add extra flag definition for ids_flag field to distinguish
between vf/pf/pt modes

v2: Updated kms driver minor version & removed pf check as default is 0
v3: Fix up version (Alex)
v4: rebase (Alex)

Proposed userspace:
https://github.com/ROCm/amdsmi/commit/e663bed7d6b3df79f5959e73981749b1f22ec698



Signed-off-by: Asad Kamal <asad.kamal@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>