drm/amd/amdgpu: Update PF2VF Header

Adding a new field for GPU Capacity to align the header with the host.

Signed-off-by: Luqmaan Irshad <Luqmaan.Irshad@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>