Switch all uses of LLVM_OVERRIDE to just use 'override' directly.

llvm-svn: 202621
diff --git a/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp b/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp
index 1dab14b..23866dc 100644
--- a/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp
+++ b/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp
@@ -32,7 +32,7 @@
                                       const MemoryObject &region,
                                       uint64_t address,
                                       raw_ostream &vStream,
-                                      raw_ostream &cStream) const LLVM_OVERRIDE;
+                                      raw_ostream &cStream) const override;
 };
 } // end anonymous namespace