use generic DMA mapping code in powerpc V4

Fri Dec 7 18:48:54 AEDT 2018

Good to know. Sorry because of the email.

Sent from my iPhone

> On 6. Dec 2018, at 20:36, Christoph Hellwig <hch at lst.de> wrote:
> 
>> On Thu, Dec 06, 2018 at 06:10:54PM +0100, Christian Zigotzky wrote:
>> Please don’t merge this code. We are still testing and trying to figure out where the problems are in the code.
> 
> The ones I sent pings for were either tested successfully by you
> (the zone change) or are trivial cleanups that don't affect your setup.