[Subtarget] Merge ProcSched and ProcDesc arrays in MCSubtargetInfo into a single array.

These arrays are both keyed by CPU name and go into the same tablegenerated file. Merge them so we only need to store keys once.

This also removes a weird space saving quirk where we used the ProcDesc.size() to create to build an ArrayRef for ProcSched.

Differential Revision: https://reviews.llvm.org/D58939

llvm-svn: 355431
diff --git a/llvm/lib/CodeGen/TargetSubtargetInfo.cpp b/llvm/lib/CodeGen/TargetSubtargetInfo.cpp
index c0520a9..59eb2f9 100644
--- a/llvm/lib/CodeGen/TargetSubtargetInfo.cpp
+++ b/llvm/lib/CodeGen/TargetSubtargetInfo.cpp
@@ -17,10 +17,10 @@
 TargetSubtargetInfo::TargetSubtargetInfo(
     const Triple &TT, StringRef CPU, StringRef FS,
     ArrayRef<SubtargetFeatureKV> PF, ArrayRef<SubtargetSubTypeKV> PD,
-    const SubtargetInfoKV *ProcSched, const MCWriteProcResEntry *WPR,
+    const MCWriteProcResEntry *WPR,
     const MCWriteLatencyEntry *WL, const MCReadAdvanceEntry *RA,
     const InstrStage *IS, const unsigned *OC, const unsigned *FP)
-    : MCSubtargetInfo(TT, CPU, FS, PF, PD, ProcSched, WPR, WL, RA, IS, OC, FP) {
+    : MCSubtargetInfo(TT, CPU, FS, PF, PD, WPR, WL, RA, IS, OC, FP) {
 }
 
 TargetSubtargetInfo::~TargetSubtargetInfo() = default;