[compiler] [wasm] Introduce Word32/64ReverseBytes as TF Optional Opcode

src/compiler/ppc/instruction-selector-ppc.cc

Index: src/compiler/ppc/instruction-selector-ppc.cc
diff --git a/src/compiler/ppc/instruction-selector-ppc.cc b/src/compiler/ppc/instruction-selector-ppc.cc
index 4e8e7af441096a035af9ff4971d993611d0b2041..f45ce43902aba44d981a78decf8bab1141a81c57 100644
--- a/src/compiler/ppc/instruction-selector-ppc.cc
+++ b/src/compiler/ppc/instruction-selector-ppc.cc
@@ -959,6 +959,9 @@ void InstructionSelector::VisitWord32ReverseBits(Node* node) { UNREACHABLE(); }
 void InstructionSelector::VisitWord64ReverseBits(Node* node) { UNREACHABLE(); }
 #endif
 
+void InstructionSelector::VisitWord64ReverseBytes(Node* node) { UNREACHABLE(); }
+
+void InstructionSelector::VisitWord32ReverseBytes(Node* node) { UNREACHABLE(); }
 
 void InstructionSelector::VisitInt32Add(Node* node) {
   VisitBinop<Int32BinopMatcher>(this, node, kPPC_Add, kInt16Imm);