update NEWS for 2.7.1

Signed-off-by: Carl Zhang <carl.zhang@intel.com>
diff --git a/NEWS b/NEWS
index 40c2b52..f9c99ff 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,10 @@
-libva NEWS -- summary of user visible changes.  2020-03-26
+libva NEWS -- summary of user visible changes.  2020-04-18
 Copyright (C) 2009-2020 Intel Corporation
 
+version 2.7.1 - 18.Apr.2020
+* VA/X11: enable driver candidate selection for DRI2
+* VA/X11: VAAPI driver mapping for iris DRI driver 
+
 version 2.7.0 - 26.Mar.2020
 * trace: av1 decode buffers trace
 * trace: Add HEVC REXT and SCC trace for decoding.