linux-imx

drm/tegra: gem: Implement mmap() for PRIME buffers

The mapping of PRIME buffers can reuse much of the GEM mapping code, so
extract the common bits into a new tegra_gem_mmap() helper.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>