[Interpreter]: Add kRegList operand type for register list operands.

src/interpreter/bytecode-decoder.h

Index: src/interpreter/bytecode-decoder.h
diff --git a/src/interpreter/bytecode-decoder.h b/src/interpreter/bytecode-decoder.h
index 6613179d0c1734d3ae02ec5dfc701276637f577c..d1749efb7f86b8604c9ee9f6b40395dcb4c7859f 100644
--- a/src/interpreter/bytecode-decoder.h
+++ b/src/interpreter/bytecode-decoder.h
@@ -21,6 +21,12 @@ class BytecodeDecoder final {
                                         OperandType operand_type,
                                         OperandScale operand_scale);
 
+  // Decodes a register list operand in a byte array.
+  static RegisterList DecodeRegisterListOperand(const uint8_t* operand_start,
+                                                uint32_t count,
+                                                OperandType operand_type,
+                                                OperandScale operand_scale);
+
   // Decodes a signed operand in a byte array.
   static int32_t DecodeSignedOperand(const uint8_t* operand_start,
                                      OperandType operand_type,