ia64: add option to suppress warnings about A/B-step errata

[Jim Wilson]

On Tue, 2004-04-13 at 00:10, Jim Wilson wrote:
> I was just double-checking this, and I noticed that the assembler does
> ignore unrecognized -m options.

Never mind.  Gas exits without printing an error, but it is failing. 
That is a bug.  I believe the problem is that we put m in md_shortops. 
Likewise for N.
-- 
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com