[MachO/X86_64] Simplify isDataInCodeTransition().
[MachO/X86_64] Simplify isDataInCodeTransition().

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@300385 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld