drm: fix all sparse warning on 32-bit x86

Finally cleaned up the sparse warnings for the drm.

Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/r128_drv.h b/drivers/char/drm/r128_drv.h
index 87c5e13..5c79e40 100644
--- a/drivers/char/drm/r128_drv.h
+++ b/drivers/char/drm/r128_drv.h
@@ -128,6 +128,9 @@
 	drm_r128_freelist_t *list_entry;
 } drm_r128_buf_priv_t;
 
+extern drm_ioctl_desc_t r128_ioctls[];
+extern int r128_max_ioctl;
+
 				/* r128_cce.c */
 extern int r128_cce_init(DRM_IOCTL_ARGS);
 extern int r128_cce_start(DRM_IOCTL_ARGS);