Some warning fixes for opcodes

[Nick Clifton]

Hi Andreas,

> 2001-08-31  Andreas Jaeger  <aj@suse.de>
> 
> 	* tic54x-opc.c: Add default initializers to avoid warnings.
> 
> 	* arc-opc.c: Include "sysdep.h" to get stdio.h as include file.
> 	* arc-ext.c: Likewise.

Approved.

Cheers
        Nick