drm: hide legacy sg cleanup better from common code

I've decided that some clear markers for what's legacy dri1/non-gem
code is useful. I've opted to use the drm_legacy prefix and then hide
all the checks in that function for better readability in the common
code.

Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 813ca1d..10d9f83 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1522,7 +1522,7 @@
 #endif
 
 				/* Scatter Gather Support (drm_scatter.h) */
-extern void drm_sg_cleanup(struct drm_sg_mem * entry);
+extern void drm_legacy_sg_cleanup(struct drm_device *dev);
 extern int drm_sg_alloc(struct drm_device *dev, void *data,
 			struct drm_file *file_priv);
 extern int drm_sg_free(struct drm_device *dev, void *data,