[llvm] [clang] [RISCV] Add -march support for many of the S extensions mentioned in the profile specification. (PR #79399)

[Luke Lau via llvm-commits]

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@@ -91,9 +91,24 @@ on support follow.
      ``E``            Supported (`See note <#riscv-rve-note>`__)
      ``H``            Assembly Support
      ``M``            Supported
+     ``Shcounterenw`` Assembly Support
+     ``Shgatpa``      Assembly Support
+     ``Shtvala``      Assembly Support
+     ``Shvsatpa``    Assembly Support
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lukel97 wrote:

Nit, missing a space here

https://github.com/llvm/llvm-project/pull/79399