[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/LiveInterval.cpp b/llvm/lib/CodeGen/LiveInterval.cpp
index c320b62..b306932 100644
--- a/llvm/lib/CodeGen/LiveInterval.cpp
+++ b/llvm/lib/CodeGen/LiveInterval.cpp
@@ -986,7 +986,7 @@
 }
 
 void LiveInterval::print(raw_ostream &OS) const {
-  OS << PrintReg(reg) << ' ';
+  OS << printReg(reg) << ' ';
   super::print(OS);
   // Print subranges
   for (const SubRange &SR : subranges())