Simplify and rename function overrideFunctionAttributes. NFC.

This is in preparation to making changes needed to stop resetting
NoFramePointerElim in resetTargetOptions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238079 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed