[llvm] [RISCV] Align MCOperandPredicates with AsmParser (PR #146184)

[Fangrui Song via llvm-commits]

================
@@ -179,6 +179,7 @@ class MCOperand {
   LLVM_ABI void print(raw_ostream &OS, const MCContext *Ctx = nullptr) const;
   LLVM_ABI void dump() const;
   LLVM_ABI bool isBareSymbolRef() const;
+  LLVM_ABI bool isSimpleSymbolRef(MCExpr::Spec &Specifier) const;
----------------
MaskRay wrote:

I think we should try eliminating isBareSymbolRef instead of adding more variants...

https://github.com/llvm/llvm-project/pull/146184