linux/hardware/cpu: add some missing AMD CPUs

[alebcay]

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Follow-up to #18743.

• Add a cpu_model parameter on amd_family
• Differentiate between Zen 1 and 2, as well as Zen 3 and 4
• Add Zen 5
• While we're here, add missing families/models (both AMD and Intel) into cpu_spec.rb

[MikeMcQuaid]

Thanks @alebcay!