Revert r247692: Replace Triple with a new TargetTuple in MCTargetDesc/* and related. NFC.

Eric has replied and has demanded the patch be reverted.

llvm-svn: 247702
diff --git a/llvm/lib/Target/Mips/MipsTargetMachine.cpp b/llvm/lib/Target/Mips/MipsTargetMachine.cpp
index d68389e..1c77745 100644
--- a/llvm/lib/Target/Mips/MipsTargetMachine.cpp
+++ b/llvm/lib/Target/Mips/MipsTargetMachine.cpp
@@ -48,8 +48,7 @@
                                      const TargetOptions &Options,
                                      bool isLittle) {
   std::string Ret = "";
-  MipsABIInfo ABI =
-      MipsABIInfo::computeTargetABI(TargetTuple(TT), CPU, Options.MCOptions);
+  MipsABIInfo ABI = MipsABIInfo::computeTargetABI(TT, CPU, Options.MCOptions);
 
   // There are both little and big endian mips.
   if (isLittle)
@@ -91,8 +90,7 @@
     : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options, isLittle), TT,
                         CPU, FS, Options, RM, CM, OL),
       isLittle(isLittle), TLOF(make_unique<MipsTargetObjectFile>()),
-      ABI(MipsABIInfo::computeTargetABI(TargetTuple(TT), CPU,
-                                        Options.MCOptions)),
+      ABI(MipsABIInfo::computeTargetABI(TT, CPU, Options.MCOptions)),
       Subtarget(nullptr), DefaultSubtarget(TT, CPU, FS, isLittle, *this),
       NoMips16Subtarget(TT, CPU, FS.empty() ? "-mips16" : FS.str() + ",-mips16",
                         isLittle, *this),