Remove ARM support for soft float (pre-VFP2)

src/platform-linux.cc

Index: src/platform-linux.cc
diff --git a/src/platform-linux.cc b/src/platform-linux.cc
index 1f9cde151c13f554a108a4b90b74573187808cdd..e1bcb6bf9186f8df2c8f6b19f43f271a56c3a31d 100644
--- a/src/platform-linux.cc
+++ b/src/platform-linux.cc
@@ -146,9 +146,6 @@ bool OS::ArmCpuHasFeature(CpuFeature feature) {
   // facility is universally available on the ARM architectures,
   // so it's up to individual OSes to provide such.
   switch (feature) {
-    case VFP2:
-      search_string = "vfp";
-      break;
     case VFP3:
       search_string = "vfpv3";
       break;
@@ -1278,6 +1275,7 @@ void OS::SetUp() {
 #ifdef __arm__
   // When running on ARM hardware check that the EABI used by V8 and
   // by the C code is the same.
+  ASSERT(FLAG_enable_vfp2);  // As of 3.18, VFP2 is required for V8
   bool hard_float = OS::ArmUsingHardFloat();
   if (hard_float) {
 #if !USE_EABI_HARDFLOAT