nixos-hardware

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Description of changes

Add hardware configs for the following Lenovo models:

• ThinkPad P14s Gen 1 (AMD)
• ThinkPad P14s Gen 3 (AMD)
• ThinkPad P14s Gen 4 (AMD)
• ThinkPad T14 Gen 4 (AMD)

The only model I don't own and haven't tested is the T14 Gen 4 (AMD), which should actually be identical to the P14s Gen 4 except it can't be configured with more than 32GB of RAM.

The P14s base config differs slightly from the T14 base config, so align them.

In addition, enable the amd_pstate driver on P14s/T14 Gen 2 and above, which run Zen 3+ and thus are supported by the driver. This is needed for proper power profiles support.

Things done

• [x] Tested the changes in your own NixOS Configuration
• [x] Tested the changes end-to-end by using your fork of nixos-hardware and importing it via <nixos-hardware> or Flake input