[llvm] [Support] Make getMaxValue and getMinValue constexpr variables (NFC) (PR #161480)

[Tim Gymnich via llvm-commits]

https://github.com/tgymnich approved this pull request.

LGTM, the `inline` seems unnecessary since `static` and `constexpr` should already imply `inline` on data members.

https://github.com/llvm/llvm-project/pull/161480