gfxhub_v1_0_get_mc_fb_offset
u64 gfxhub_v1_0_get_mc_fb_offset(struct amdgpu_device *adev);
adev->vm_manager.vram_base_offset = gfxhub_v1_0_get_mc_fb_offset(adev);
adev->gmc.aper_base = gfxhub_v1_0_get_mc_fb_offset(adev);