[clang] [llvm] [RISCV] Add Svrsw60t59b extension (PR #132321)

[Craig Topper via cfe-commits]

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@@ -159,6 +159,7 @@ on support follow.
      ``Svnapot``       Assembly Support
      ``Svpbmt``        Supported
      ``Svvptc``        Supported
+     ``Svrsw60t59b``   Supported
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topperc wrote:

This should be above `Svvptc` alphabetically

https://github.com/llvm/llvm-project/pull/132321