drm/i915: select CRC32

kbuild test robot found a build failure when building with thin
archives:

http://marc.info/?l=linux-kbuild&m=149802285009737&w=2



Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170621063420.24913-1-npiggin@gmail.com