[CodeGen] Rename functions PrintReg* to printReg*

LLVM Coding Standards:
  Function names should be verb phrases (as they represent actions), and
  command-like function should be imperative. The name should be camel
  case, and start with a lower case letter (e.g. openFile() or isFoo()).

Differential Revision: https://reviews.llvm.org/D40416

llvm-svn: 319168
diff --git a/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp b/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp
index 8c40608..36ce1c2 100644
--- a/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp
@@ -159,7 +159,7 @@
   // same types because the type is a placeholder when this function is called.
   MachineInstr *MI =
       MIRBuilder.buildInstrNoInsert(TargetOpcode::COPY).addDef(Dst).addUse(Src);
-  DEBUG(dbgs() << "Copy: " << PrintReg(Src) << " to: " << PrintReg(Dst)
+  DEBUG(dbgs() << "Copy: " << printReg(Src) << " to: " << printReg(Dst)
                << '\n');
   // TODO:
   // Check if MI is legal. if not, we need to legalize all the