[llvm] [PowerPC][AIX] Emit PowerPC version for XCOFF (PR #95510)

[Chen Zheng via llvm-commits]

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@@ -334,9 +334,20 @@ enum CFileLangId : uint8_t {
 };
 
 enum CFileCpuId : uint8_t {
-  TCPU_PPC64 = 2, ///< PowerPC common architecture 64-bit mode.
-  TCPU_COM = 3,   ///< POWER and PowerPC architecture common.
-  TCPU_970 = 19   ///< PPC970 - PowerPC 64-bit architecture.
+  TCPU_INVALID = 0, ///< Invalid id - assumes POWER for old objects.
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chenzheng1030 wrote:

nit: Maybe you can add a comments to say that these definitions are from AIX OS headers? So that we know that these are XCOFF specific.

https://github.com/llvm/llvm-project/pull/95510