Revert "Better support for x86 XMM registers"

The invalid usage of loc.fp must be corrected before this change can be submitted.

This reverts commit 766a5e5940b469ab40e52770862c81cfec1d835b.

Change-Id: I1173a9bf829da89cccd9c2898f5e11164987a22b
diff --git a/compiler/dex/vreg_analysis.cc b/compiler/dex/vreg_analysis.cc
index f211e3f..bef966c 100644
--- a/compiler/dex/vreg_analysis.cc
+++ b/compiler/dex/vreg_analysis.cc
@@ -405,7 +405,7 @@
 }
 
 static const RegLocation fresh_loc = {kLocDalvikFrame, 0, 0, 0, 0, 0, 0, 0, 0,
-                                     kVectorNotUsed, INVALID_REG, INVALID_REG, INVALID_SREG,
+                                     INVALID_REG, INVALID_REG, INVALID_SREG,
                                      INVALID_SREG};
 
 void MIRGraph::InitRegLocations() {