[RISCV] Fix typo in comment. NFC

Author: topperc

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

@@ -16268,7 +16268,7 @@ static SDValue performXORCombine(SDNode *N, SelectionDAG &DAG,
   SDValue N1 = N->getOperand(1);
 
   // Pre-promote (i32 (xor (shl -1, X), ~0)) on RV64 with Zbs so we can use
-  // (ADDI (BSET X0, X), -1). If we wait until/ type legalization, we'll create
+  // (ADDI (BSET X0, X), -1). If we wait until type legalization, we'll create
   // RISCVISD:::SLLW and we can't recover it to use a BSET instruction.
   if (Subtarget.is64Bit() && Subtarget.hasStdExtZbs() &&
       N->getValueType(0) == MVT::i32 && isAllOnesConstant(N1) &&