use generic DMA mapping code in powerpc V4

Thu Jan 17 20:31:17 AEDT 2019

On Thu, Jan 17, 2019 at 10:21:11AM +0100, Christian Zigotzky wrote:
> The X1000 boots and the PASEMI onboard ethernet works!
>
> Bad news for the X5000 (P5020 board). U-Boot loads the kernel and the dtb 
> file. Then the kernel starts but it doesn't find any hard disks 
> (partitions).

Thanks for bisecting so far, and lets stop here until I manage to
resolve the problem.

Can you send me the .config and the dtb file for this board?