[clang] [llvm] [RISCV][clang] Support XSfmm ABI attributes (PR #206260)

[Brandon Wu via cfe-commits]

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@@ -4869,6 +4872,46 @@ class FunctionType : public Type {
     ARM_InOut = 4,
   };
 
+  /// RISC-V type attributes for states.
+  enum RISCVTypeAttributes : uint8_t {
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4vtomat wrote:

I think it should be unsigned😅

https://github.com/llvm/llvm-project/pull/206260