PRT support for amdgpu v3

[Bas Nieuwenhuizen]

Tested on amd-staging-4.9 + these patches, and it works for me too.

Thanks,
Bas Nieuwenhuizen

On Wed, Feb 8, 2017, at 16:04, Christian König wrote:
> Hi guys,
> 
> ok I finally found time to write an unit test for this and hammered out
> the last few bugs.
> 
> Seems to work fine on my Tonga now. Please note that this set is based on
> "fix race in GEM VA map IOCTL v2", without that patch you will run into a
> NULL pointer dereference during PRT mapping.
> 
> Going to send out the unit test in a minute.
> 
> Regards,
> Christian.
> 
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