drm/i915: Fix typo from e5281ccd in i915_gem_attach_phys_object()

Accessing the uninitialised obj->pages instead of the local page lead to
an OOPs.

Reported-by: Xavier Chantry <chantry.xavier@gmail.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
1 file changed