[X86] Add AES to KNL CPUs to match clang.

I believe this was lost from KNL when AES was pushed from Westmere to Skylake recently. KNL used to inherit from IVB.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@345519 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed