linux-phytec-fsl

drm/i915: shrinker_control->nr_to_scan is now unsigned long

As the shrinker_control now passes us unsigned long targets, update our
shrinker functions to match.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>