CPU: Print out flatten-out register index as with IntRegs/FloatRegs traceflag
CPU: Print out flatten-out register index as with IntRegs/FloatRegs traceflag

andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin