Revert r283690, "MC: Remove unused entities."

llvm-svn: 283814
diff --git a/llvm/lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp b/llvm/lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp
index fcf0766..5acb81d 100644
--- a/llvm/lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp
+++ b/llvm/lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp
@@ -261,7 +261,7 @@
 
   // Override MCParsedAsmOperand.
   SMLoc getStartLoc() const override { return StartLoc; }
-  SMLoc getEndLoc() const { return EndLoc; }
+  SMLoc getEndLoc() const override { return EndLoc; }
   void print(raw_ostream &OS) const override;
 
   // Used by the TableGen code to add particular types of operand