[llvm] [RISCV] Add support for vendor relocations on Xqci extensions (PR #135400)

[Craig Topper via llvm-commits]

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@@ -125,6 +125,18 @@ class MCAsmBackend {
     return false;
   }
 
+  /// Hook to add any marker relocations that the target may need in addition
+  /// to the normal relocations on instructions. Currently used only by RISCV
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topperc wrote:

RISCV -> RISC-V

https://github.com/llvm/llvm-project/pull/135400