dt-bindings: gk20a: Document iommus property

GK20A can optionally make use of an IOMMU.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Alexandre Courbot 2016-03-28 18:23:01 +09:00 • committed by Thierry Reding
commit 375d244702