drm/mode_object: fix documentation for object lookups.

The lease updates missed a few bits of docs, fixed up
the wrong name on the property lookup fn as well.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c
index 2affe53..279c103 100644
--- a/drivers/gpu/drm/drm_framebuffer.c
+++ b/drivers/gpu/drm/drm_framebuffer.c
@@ -681,6 +681,7 @@ EXPORT_SYMBOL(drm_framebuffer_init);
 /**
  * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
  * @dev: drm device
+ * @file_priv: drm file to check for lease against.
  * @id: id of the fb object
  *
  * If successful, this grabs an additional reference to the framebuffer -