[AArch64] Enabled AA support for Cortex-A53.

Patch by Sanjin Sijaric <ssijaric@codeaurora.org>!
Phabricator Review: http://reviews.llvm.org/D5103

llvm-svn: 217370

llvm/lib/Target/AArch64/AArch64Subtarget.h

@@ -111,6 +111,8 @@ public:
   bool isCortexA57() const { return CPUString == "cortex-a57"; }
   bool isCortexA53() const { return CPUString == "cortex-a53"; }
 
+  bool useAA() const override { return isCortexA53(); }
+
   /// getMaxInlineSizeThreshold - Returns the maximum memset / memcpy size
   /// that still makes it profitable to inline the call.
   unsigned getMaxInlineSizeThreshold() const { return 64; }