docs: fixes, changes for Mesa 7.7

docs/relnotes-7.7.html

@@ -44,11 +44,14 @@ tbd
 
 <h2>Bug fixes</h2>
 <ul>
+<li>Many assorted i965 driver fixes.
 </ul>
 
 
 <h2>Changes</h2>
 <ul>
+<li>New Mesa texture/surface format infrastructure
+<li>Removed some unused Mesa device driver hooks
 </ul>
 
 </body>