use generic DMA mapping code in powerpc V4

[Christian Zigotzky]

Next step: c446404b041130fbd9d1772d184f24715cf2362f (powerpc/dma: remove 
dma_nommu_mmap_coherent)

git clone git://git.infradead.org/users/hch/misc.git -b powerpc-dma.6 a

git checkout c446404b041130fbd9d1772d184f24715cf2362f

Output:

Note: checking out 'c446404b041130fbd9d1772d184f24715cf2362f'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:

   git checkout -b <new-branch-name>

HEAD is now at c446404... powerpc/dma: remove dma_nommu_mmap_coherent

-----

Link to the Git: 
http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/powerpc-dma.6

Result: PASEMI onboard ethernet works and the X5000 (P5020 board) boots.

-- Christian