Add a Subtarget feature 'v8fp' to the ARM backend.

llvm-svn: 185073
diff --git a/llvm/lib/Target/ARM/ARMSubtarget.cpp b/llvm/lib/Target/ARM/ARMSubtarget.cpp
index 3a5d4bb..c592421 100644
--- a/llvm/lib/Target/ARM/ARMSubtarget.cpp
+++ b/llvm/lib/Target/ARM/ARMSubtarget.cpp
@@ -81,6 +81,7 @@
   HasVFPv2 = false;
   HasVFPv3 = false;
   HasVFPv4 = false;
+  HasV8FP = false;
   HasNEON = false;
   UseNEONForSinglePrecisionFP = false;
   UseMulOps = UseFusedMulOps;