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/savage_drv.h b/drivers/char/drm/savage_drv.h
index 358f4fb..a4b0fa9 100644
--- a/drivers/char/drm/savage_drv.h
+++ b/drivers/char/drm/savage_drv.h
@@ -104,6 +104,9 @@
 	S3_LAST
 };
 
+extern drm_ioctl_desc_t savage_ioctls[];
+extern int savage_max_ioctl;
+
 #define S3_SAVAGE3D_SERIES(chip)  ((chip>=S3_SAVAGE3D) && (chip<=S3_SAVAGE_MX))
 
 #define S3_SAVAGE4_SERIES(chip)  ((chip==S3_SAVAGE4)            \