Revert r319691: [globalisel][tablegen] Split atomic load/store into separate opcode and enable for AArch64.

Some concerns were raised with the direction. Revert while we discuss it and look into an alternative



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@319739 91177308-0d34-0410-b5e6-96231b3b80d8
17 files changed