[compiler-rt] [llvm] [AArch64] Extend Windows CPU feature detection with more features. (PR #171930)

[Martin Storsjö via llvm-commits]

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

LGTM

Regarding this, I find it interesting that there have been so much difference in the WinSDK headers, within SDKs that all supposedly are for version 10.0.26100.0, when these features were missing in the older revisions.

https://github.com/llvm/llvm-project/pull/171930