Clean up powerpc fegetround / __fegetround inlines

[Joseph Myers]

On Tue, 30 Dec 2014, Carlos O'Donell wrote:

> Is there any reason you're not using [PATCH] in the prefix?

I don't find [PATCH] markers useful (indeed, I find them to have negative 
utility, just serving to hide and distract from substantive information); 
I think patches can be assumed as the default.

> Is this a WIP or RFC?

It's a patch proposed for inclusion that I hope Adhemerval might review / 
comment on.

-- 
Joseph S. Myers
joseph@codesourcery.com