Revert r289979 due to regressions

llvm-svn: 289991
diff --git a/clang/lib/Sema/DeclSpec.cpp b/clang/lib/Sema/DeclSpec.cpp
index a55cdcc..cc644c7 100644
--- a/clang/lib/Sema/DeclSpec.cpp
+++ b/clang/lib/Sema/DeclSpec.cpp
@@ -558,7 +558,7 @@
   // OpenCL v1.2 s6.8 changes this to "The auto and register storage-class
   // specifiers are not supported."
   if (S.getLangOpts().OpenCL &&
-      !S.getOpenCLOptions().isEnabled("cl_clang_storage_class_specifiers")) {
+      !S.getOpenCLOptions().cl_clang_storage_class_specifiers) {
     switch (SC) {
     case SCS_extern:
     case SCS_private_extern: