R600: Fix R600ControlFlowFinalizer not considering VTX_READ 128 bit dst reg

Patch by: Vincent Lejeune

https://bugs.freedesktop.org/show_bug.cgi?id=64877

NOTE: This is a candidate for the 3.3 branch.


Merged from r182600
Author: Tom Stellard <thomas.stellard@amd.com>
Date:   Thu May 23 18:26:42 2013 +0000

llvm-svn: 185868