[AArch64] Update for Exynos

Fix the feature set for Exynos M4 by removing support for `+fp16fml` and fix test case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356698 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed