MC: Clean up method names in MCContext.

The naming was a mish-mash of old and new style. Update to be consistent
with the new. NFC.

llvm-svn: 237594
diff --git a/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp b/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
index 7146f59..4851815 100644
--- a/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
@@ -302,7 +302,7 @@
     AFI->setLocalStackSize(NumBytes);
 
     // Label used to tie together the PROLOG_LABEL and the MachineMoves.
-    MCSymbol *FrameLabel = MMI.getContext().CreateTempSymbol();
+    MCSymbol *FrameLabel = MMI.getContext().createTempSymbol();
 
     // REDZONE: If the stack size is less than 128 bytes, we don't need
     // to actually allocate.