Implement conversion traits for PhysAddr and VirtAddr#394

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mikeleany wants to merge 4 commits intorust-osdev:masterfrom

mikeleany:master

Commits on Oct 22, 2022

Impl `From` and `TryFrom` traits for `VirtAddr`.
mikeleany
committed

Commits on Oct 23, 2022

Commits on Oct 31, 2022

Adjust `cfg`s on pointer-sized converions.
mikeleany
committed