[clang] [compiler-rt] [llvm] [X86] Support -march=diamondrapids (PR #113881)

[Freddy Ye via cfe-commits]

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@@ -121,6 +121,7 @@ enum CPUKind {
   CK_GraniterapidsD,
   CK_Emeraldrapids,
   CK_Clearwaterforest,
+  CK_DiamondRapids,
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FreddyLeaf wrote:

I prefer your style, too. Let's refine CK_SapphireRapids as well in the future

https://github.com/llvm/llvm-project/pull/113881