Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."

Reverting due to ARM MCJIT and MIPS LLD error.

This reverts commit r289659.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289667 91177308-0d34-0410-b5e6-96231b3b80d8
67 files changed