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/ARM/ARMSubtarget.cpp b/llvm/lib/Target/ARM/ARMSubtarget.cpp
index 0f20694..50e9e6a 100644
--- a/llvm/lib/Target/ARM/ARMSubtarget.cpp
+++ b/llvm/lib/Target/ARM/ARMSubtarget.cpp
@@ -81,7 +81,7 @@
 ARMSubtarget::ARMSubtarget(const Triple &TT, const std::string &CPU,
                            const std::string &FS,
                            const ARMBaseTargetMachine &TM, bool IsLittle)
-    : ARMGenSubtargetInfo(TargetTuple(TT), CPU, FS), ARMProcFamily(Others),
+    : ARMGenSubtargetInfo(TT, CPU, FS), ARMProcFamily(Others),
       ARMProcClass(None), stackAlignment(4), CPUString(CPU), IsLittle(IsLittle),
       TargetTriple(TT), Options(TM.Options), TM(TM),
       FrameLowering(initializeFrameLowering(CPU, FS)),
@@ -159,8 +159,7 @@
   // Insert the architecture feature derived from the target triple into the
   // feature string. This is important for setting features that are implied
   // based on the architecture version.
-  std::string ArchFS =
-      ARM_MC::ParseARMTargetTuple(TargetTuple(TargetTriple), CPUString);
+  std::string ArchFS = ARM_MC::ParseARMTriple(TargetTriple, CPUString);
   if (!FS.empty()) {
     if (!ArchFS.empty())
       ArchFS = (Twine(ArchFS) + "," + FS).str();