[PATCH] AMD chip IDs fix-up

[Mattias Mattsson]

Hi,

This patch:

- Changes chip ID constant names to the "canonical" chip name for AMD chips

- Adds useful comments where the same ID corresponds to different chips.

- Also adds a bunch of new chip IDs.

All IDs are verified against the official AMD datasheets.

Signed-off-by: Mattias Mattsson