Fix unsoundness in our representation of the MADT#223

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IsaacWoods wants to merge 2 commits intorust-osdev:mainfrom IsaacWoods:sound_madt

+30-14

Commits on Oct 6, 2024

Prevent getting a raw reference from PhysicalMapping if T: !Unpin
IsaacWoods
committed

Commits on Oct 13, 2024

Make the MADT !Unpin to prevent unsoundness
IsaacWoods
committed