drm/i915: Don't select BROKEN

It's broken.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
References: https://lists.freedesktop.org/archives/dri-devel/2019-November/242625.html
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191105193829.11599-1-daniel.vetter@ffwll.ch