[clang] [compiler-rt] [llvm] [X86] Hygon Processors Initial enablement (PR #187622)

[Simon Pilgrim via cfe-commits]

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

LGTM - although we REALLY need to get X86TargetParser.def‎ etc. synced with libgcc again before 23.x

https://github.com/llvm/llvm-project/pull/187622