drop unneeded config.h includes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147197 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Atomic.cpp b/lib/Support/Atomic.cpp
index 94760cc..3001f6c 100644
--- a/lib/Support/Atomic.cpp
+++ b/lib/Support/Atomic.cpp
@@ -12,7 +12,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/Support/Atomic.h"
-#include "llvm/Config/config.h"
+#include "llvm/Config/llvm-config.h"
using namespace llvm;