drm/i915: [dinq] shut up two instances -Wunitialized

Introduced in commit 8461d226 and 8c59967c



Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: s/fix/shut up/ in the commit msg.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>