[llvm] [InstrProf] Change step from 64-bit to pointer-sized int (PR #83239)

[Fangrui Song via llvm-commits]

MaskRay wrote:

This is incorrect. See https://github.com/rust-lang/rust/issues/112313
In the absence of `__sync_fetch_and_add_8`, the best is to consider the feature unusable on Rust's mips port.

https://github.com/llvm/llvm-project/pull/83239