[ARM] Fix typo

Fix typo in r350952.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@350986 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARM.td b/lib/Target/ARM/ARM.td
index 5d5b4c8..3db60f1 100644
--- a/lib/Target/ARM/ARM.td
+++ b/lib/Target/ARM/ARM.td
@@ -1078,7 +1078,6 @@
 def : ProcNoItin<"exynos-m1",                           [ARMv8a, ProcExynos]>;
 def : ProcNoItin<"exynos-m2",                           [ARMv8a, ProcExynos]>;
 def : ProcNoItin<"exynos-m3",                           [ARMv8a, ProcExynos]>;
-def : ProcNoItin<"exynos-m4",                           [ARMv8a, ProcExynos]>;
 def : ProcNoItin<"exynos-m4",                           [ARMv82a, ProcExynos,
                                                          FeatureFullFP16,
                                                          FeatureDotProd]>;