[clang] [llvm] [AArch64] Rename memory hints to avoid clash with arm_acle.h macros (PR #226432)

[Kerry McLaughlin via llvm-commits]

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@@ -40,6 +40,12 @@ void __sev(void);
 void __sevl(void);
 void __yield(void);
 
+/* Atomic Hints */
+#if defined(__ARM_64BIT_STATE) && __ARM_64BIT_STATE
+const int HINT_STSHH_KEEP = 0;
+const int HINT_STSHH_STRM = 1;
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kmclaughlin-arm wrote:

Thank you for reviewing this, @efriedma-quic.

I also haven't found any ifdefs being used in this way. I removed the changes to make these `const int` in the latest commit and reverted back to using defines.

https://github.com/llvm/llvm-project/pull/226432