accept 64-bit constant addresses in mips n32

[Eric Christopher]

> 
> ______________________________________________________________________
> 
> Index: gas/ChangeLog
> from  Alexandre Oliva  <aoliva@redhat.com>
> 
> 	* config/tc-mips.c (macro): Add comments explaining the rationale
> 	for Chris' change.


Awesome. Thanks.

-eric

> 
> ______________________________________________________________________
-- 
Eric Christopher <echristo@redhat.com>