Fix uses in ARM table media_instructions.

src/trusted/validator_arm/baseline_classes.cc

Index: src/trusted/validator_arm/baseline_classes.cc
===================================================================
--- src/trusted/validator_arm/baseline_classes.cc	(revision 10458)
+++ src/trusted/validator_arm/baseline_classes.cc	(working copy)
@@ -200,6 +200,10 @@
   return RegisterList(d.reg(i));
 }
 
+RegisterList Binary2RegisterBitRangeMsbGeLsb::uses(Instruction i) const {
+  return RegisterList(n.reg(i));
+}
+
 // Binary2RegisterBitRangeNotRnIsPcBitfieldExtract
 SafetyLevel Binary2RegisterBitRangeNotRnIsPcBitfieldExtract
 ::safety(Instruction i) const {
@@ -347,6 +351,8 @@
     return UNPREDICTABLE;
   }
 
+  // TODO(karl): This doesn't apply to all uses in rows in armv7.table.
+  // However, it doesn't really matter since we only accept version 7.
   if ((ArchVersion() < 6) && m.reg(i).Equals(n.reg(i))) return UNPREDICTABLE;
 
   // Note: We would restrict out PC as well for Rd in NaCl, but no need