[RISCV] Replace (XLenVT (VLOp GPR:$vl)) with VLOpFrag

This is for D100288 to reduce the changes.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D103682

llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td

@@ -2309,7 +2309,7 @@ class VPatTiedBinaryMask<string intrinsic_name,
                    (result_type result_reg_class:$merge),
                    (op2_type op2_kind:$rs2),
                    (mask_type V0),
-                   (XLenVT (VLOp GPR:$vl)))),
+                   VLOpFrag)),
                    (!cast<Instruction>(inst#"_MASK_TIED")
                    (result_type result_reg_class:$merge),
                    (op2_type op2_kind:$rs2),