drm/msm: add madvise ioctl
Doesn't do anything too interesting until we wire up shrinker. Pretty
much lifted from i915.
Signed-off-by: NRob Clark <robdclark@gmail.com>
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Doesn't do anything too interesting until we wire up shrinker. Pretty
much lifted from i915.
Signed-off-by: NRob Clark <robdclark@gmail.com>