reg_name doesn't accept CSR names in command-line mode

[jplanck]

I am unable to print the CSR values when executing from the command line.
~$java -jar ~/opt/riscv/rars/rars1_5.jar riscv1.asm nc utvec
Invalid Command Argument: utvec

Linux version 5.11.0-38-generic (buildd@lgw01-amd64-041) (gcc (Ubuntu 9.3.0-17ubuntu120.04) 9.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #4220.04.1-Ubuntu SMP Tue Sep 28 20:41:07 UTC 2021

[TheThirdOne]

This is a very reasonable feature request.