Add const.

llvm-svn: 205013
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
index e11a5f3..190aa14 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
@@ -254,7 +254,7 @@
                                        const MCAsmLayout &Layout,
                                        const MCFixup &Fixup,
                                        const MCFragment *DF,
-                                       MCValue &Target,
+                                       const MCValue &Target,
                                        uint64_t &Value,
                                        bool &IsResolved) {
   // At this point we'll ignore the value returned by adjustFixupValue as
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.h b/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.h
index 082a340..e827fdf 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.h
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.h
@@ -83,7 +83,8 @@
 
   void processFixupValue(const MCAssembler &Asm, const MCAsmLayout &Layout,
                          const MCFixup &Fixup, const MCFragment *DF,
-                         MCValue &Target, uint64_t &Value, bool &IsResolved);
+                         const MCValue &Target, uint64_t &Value,
+                         bool &IsResolved);
 
 }; // class MipsAsmBackend