As not all fake instructions have their real counterparts implemented yet, we specify no AssemblerPredicate for UseFakeTrue16Insts to allow both fake and real True16 instructions in assembler and disassembler tests in the -mattr=+real-true16 mode during the transition period. Source DPP and desitnation VOPDstOperand_t16 operands are still not supported and will be addressed separately.