acpi: Remove Clone Copy traits for MADT

[mrjbom]

Copying and cloning a MADT does not copy Entries, so the cloned MADT is invalid.
But or maybe it's worth doing this: #223

[IsaacWoods]

Hey @mrjbom thanks for opening this PR and for reporting the initial issue. As noted in #223 these types were originically Copy as it was required for them to be repr(packed) - this requirement seems to have been dropped at some point and is now obviously nothing but a footgun.

I think #223 is the right answer in the end as it is unsafe to move the Madt away from its entries in all cases, but is more of a breaking change. This would be a good middle-ground in the meantime - this is technically a breaking change but prevents behaviour that is unsound, so is fine as a semver bug version.

Thanks!