[clang] [llvm] [clang][LoongArch] Add support for LoongArch32 (PR #172619)

[via cfe-commits]

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@@ -67,6 +70,9 @@ enum FeatureKind : uint32_t {
 
   // sc.q is available.
   FK_SCQ = 1 << 14,
+
+  // 32-bit standard variant is available.
+  FK_32S = 1 << 5,
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wangleiat wrote:

`FK_32S` has the same value as `FK_LASX`. Does this impact feature checking?

https://github.com/llvm/llvm-project/pull/172619