ARM64: fix bug in ld3r (1d) SelectionDAG.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205293 91177308-0d34-0410-b5e6-96231b3b80d8
ARM64: add patterns for more lane-wise ld1/st1 operations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205294 91177308-0d34-0410-b5e6-96231b3b80d8