[AArch64] Add support for Samsung Exynos-M1

Adds core tuning support for new Samsung Exynos-M1 core (ARMv8-A).

Differential Revision: http://reviews.llvm.org/D15663

llvm-svn: 256828
diff --git a/llvm/lib/Target/ARM/ARMSubtarget.h b/llvm/lib/Target/ARM/ARMSubtarget.h
index a8b2801..4d54e57 100644
--- a/llvm/lib/Target/ARM/ARMSubtarget.h
+++ b/llvm/lib/Target/ARM/ARMSubtarget.h
@@ -44,7 +44,7 @@
   enum ARMProcFamilyEnum {
     Others, CortexA5, CortexA7, CortexA8, CortexA9, CortexA12, CortexA15,
     CortexA17, CortexR4, CortexR4F, CortexR5, CortexR7, CortexA35, CortexA53,
-    CortexA57, CortexA72, Krait, Swift
+    CortexA57, CortexA72, Krait, Swift, ExynosM1
   };
   enum ARMProcClassEnum {
     None, AClass, RClass, MClass