[ARM] Enable verifyInstructionPredicates

All the tests pass and a bootstrap and run of the llvm-test-suite passed
successfully. Enable verifyInstructionPredicates so that instructions which are
invalid with the current set of features produces an error.

Author: davemgreen

llvm/lib/Target/ARM/ARMAsmPrinter.cpp

@@ -1442,9 +1442,8 @@ void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) {
 #include "ARMGenMCPseudoLowering.inc"
 
 void ARMAsmPrinter::emitInstruction(const MachineInstr *MI) {
-  // TODOD FIXME: Enable feature predicate checks once all the test pass.
-  // ARM_MC::verifyInstructionPredicates(MI->getOpcode(),
-  //                                   getSubtargetInfo().getFeatureBits());
+  ARM_MC::verifyInstructionPredicates(MI->getOpcode(),
+                                      getSubtargetInfo().getFeatureBits());
 
   const DataLayout &DL = getDataLayout();
   MCTargetStreamer &TS = *OutStreamer->getTargetStreamer();