Re: Removing -Wno-format from kernel makefiles

[Theo de Raadt]

> I can't see that we would add an arch where sizeof(ptrdiff_t) != 
> sizeof(size_t).

We run on I32LP64 and ILP32, therefore, it seems better to match
't' to some other LONG print block, like 'D'.

size_t is an high-level abstraction, not a base type.