Change vOPDName to be prefix that is ignored by !substr in fake record.

Now the record has this field as before, and the fake part is included
in the record:

  string VOPDName = "v_dual_";

Author: jofrn

llvm/lib/Target/AMDGPU/VOP2Instructions.td

@@ -319,7 +319,7 @@ multiclass
 multiclass
     VOP2eInst<string opName, VOPProfile P, SDPatternOperator node = null_frag,
               string revOp = opName, bit useSGPRInput = !eq(P.NumSrcArgs, 3)>
-    : VOP2eInst_Base<opName, P, -1, "v_cndmask_b16", node, revOp, useSGPRInput>;
+    : VOP2eInst_Base<opName, P, -1, "v_", node, revOp, useSGPRInput>;
 
 multiclass
     VOP2eInst_VOPD<string opName, VOPProfile P, bits<5> VOPDOp, string VOPDName,

llvm/lib/Target/AMDGPU/VOPInstructions.td

@@ -1931,4 +1931,4 @@ def VOPTrue16Table : GenericTable {
 
   let PrimaryKey = ["Opcode"];
   let PrimaryKeyName = "getTrue16OpcodeHelper";
-}
+}