[clang] [llvm] [RISCV][MC] add experimental `Zvvfmm` MC support (PR #196486)

[via cfe-commits]

================
@@ -0,0 +1,113 @@
+//===----------------------------------------------------------------------===//
----------------
imkiva wrote:

I used git mv to rename the file and created a separate commit for it. And then the later commit adds Zvvfmm to that renamed file. But GitHub still shows the new file as "deleted+created"

https://github.com/llvm/llvm-project/pull/196486