[llvm] [RISCV] Bump hwprobe support to Linux 6.11 (PR #108578)

[Philip Reames via llvm-commits]

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

LGTM - I've gone through and made sure all the constants match.

A quick note on structuring reviews like this in the future.  The details for the individual commits are helpful, but the primary thing the reviewer needs is the state of the released tree.  You did include that in the references, but it would have been better to include that in the original description, and move the individual commits down to an appendix like structure.  I did loose some time figuring out whether the commits linked were actually released before I noticed the reference link at the bottom.  

https://github.com/llvm/llvm-project/pull/108578