[doc PATCH] Obsolete support for POWER and POWER2

[Gerald Pfeifer]

On Sat, 5 Jun 2010, Segher Boessenkool wrote:
> [Now using the text suggested by David.]
> 
> Probably no one uses these old processors anymore, and support for
> them is getting in the way of other work in the rs6000 port.

Well, if this is the text that David suggested, I say go ahead and commit.  
(Usually we deprecate in one release and remove in the following.)

Gerald