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/radeon_drv.h b/drivers/char/drm/radeon_drv.h
index 3c74734..120ee5a 100644
--- a/drivers/char/drm/radeon_drv.h
+++ b/drivers/char/drm/radeon_drv.h
@@ -281,7 +281,17 @@
 	u32 age;
 } drm_radeon_buf_priv_t;
 
+typedef struct drm_radeon_kcmd_buffer {
+	int bufsz;
+	char *buf;
+	int nbox;
+	drm_clip_rect_t __user *boxes;
+} drm_radeon_kcmd_buffer_t;
+
 extern int radeon_no_wb;
+extern drm_ioctl_desc_t radeon_ioctls[];
+extern int radeon_max_ioctl;
+
 				/* radeon_cp.c */
 extern int radeon_cp_init(DRM_IOCTL_ARGS);
 extern int radeon_cp_start(DRM_IOCTL_ARGS);
@@ -340,7 +350,7 @@
 
 extern int r300_do_cp_cmdbuf(drm_device_t * dev, DRMFILE filp,
 			     drm_file_t * filp_priv,
-			     drm_radeon_cmd_buffer_t * cmdbuf);
+			     drm_radeon_kcmd_buffer_t * cmdbuf);
 
 /* Flags for stats.boxes
  */