drm/amdkfd: Correct the topology message for APUs

drm/amdkfd: Correct the topology message for APUs

At bootup on a Strix machine the following message comes up:
```
amdgpu: Topology: Add dGPU node [0x150e:0x1002]
```

This is an APU though. Clarify the messaging by only offer a
"CPU node" or "GPU node" message. Also set the message as
VID:DID instead which is how other messages work.

Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>