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
Fix for a regression caused by the LoopVectorizer when
vectorizing loops with memory accesses to non-zero address spaces. It
simply dropped the AS info. Fixes PR16306.


Merged from r184103
Author: Pekka Jaaskelainen <pekka.jaaskelainen@tut.fi>
Date:   Mon Jun 17 18:49:06 2013 +0000