MIR Serialization: Serialize the '.cfi_def_cfa_register' CFI instruction.

llvm-svn: 243322
diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.h b/llvm/lib/CodeGen/MIRParser/MILexer.h
index bae9dcd..b84fb74 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.h
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.h
@@ -47,6 +47,7 @@
     kw_frame_setup,
     kw_debug_location,
     kw_cfi_offset,
+    kw_cfi_def_cfa_register,
     kw_cfi_def_cfa_offset,
 
     // Identifier tokens