[Alignment][NFC] Align(1) to Align::None() conversions

[gchatelet]

Summary

This is patch is part of a series to introduce an Alignment type.
See this thread for context: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851.html
See this patch for the introduction of the type: https://reviews.llvm.org/D64790

llvm/lib/CodeGen/MIRPrinter.cpp

if (MBB.hasAddressTaken()) {
     OS << "address-taken";
     HasAttributes = true;
   }
   if (MBB.isEHPad()) {
     OS << (HasAttributes ? ", " : " (");
     OS << "landing-pad";
     HasAttributes = true;
   }
-  if (MBB.getAlignment() > 1) {
+  if (MBB.getAlignment() != llvm::Align::None()) {
     OS << (HasAttributes ? ", " : " (");
     OS << "align " << MBB.getAlignment().value();
     HasAttributes = true;
   }
   if (HasAttributes)
     OS << ")";
   OS << ":\n";
 

llvm/lib/CodeGen/MachineBasicBlock.cpp

if (hasAddressTaken()) {
     OS << "address-taken";
     HasAttributes = true;
   }
   if (isEHPad()) {
     OS << (HasAttributes ? ", " : " (");
     OS << "landing-pad";
     HasAttributes = true;
   }
-  if (getAlignment() > 1) {
+  if (getAlignment() != llvm::Align::None()) {
     OS << (HasAttributes ? ", " : " (");
     OS << "align " << Log2(getAlignment());
     HasAttributes = true;
   }
   if (HasAttributes)
     OS << ")";
   OS << ":\n";