powerpc: Use pr_warn instead of pr_warning

[Joe Perches]

On Tue, 2017-12-12 at 22:39 +1100, Michael Ellerman wrote:
> On Tue, 2016-10-25 at 04:00:08 UTC, Joe Perches wrote:
> > At some point, pr_warning will be removed so all logging messages use
> > a consistent <prefix>_warn style.
> > 
> > Update arch/powerpc/
> > 
> > Miscellanea:
> > 
> > o Coalesce formats
> > o Realign arguments
> > o Use %s, __func__ instead of embedded function names
> > o Remove unnecessary line continuations
> > 
> > Signed-off-by: Joe Perches <joe at perches.com>
> > Acked-by: Geoff Levand <geoff at infradead.org>
> 
> Applied to powerpc next, thanks.
> 
> https://git.kernel.org/powerpc/c/f2c2cbcc35d47f1471a04155ac3575

OK, thanks.

But perhaps a year+ patch latency is a bit extended?