drm/i915: Fix intel_display_crc_init for !DEBUGFS

drm/i915: Fix intel_display_crc_init for !DEBUGFS

The mentioned commit changes intel_display_crc_init to take a dev_priv,
but forgets to change the stub.

Cc: David Weinehall <david.weinehall@linux.intel.com>
Fixes: 36cdd0138b7f ("drm/i915: debugfs spring cleaning")
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reported-and-by: Kim Lidström <kim@dxtr.im>
Link: http://patchwork.freedesktop.org/patch/msgid/1472116022-17598-1-git-send-email-maarten.lankhorst@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: David Weinehall <david.weinehall@linux.intel.com>