[X86] Add a missing return to combineGatherScatter after sucessful combine.

Not sure how to test this cause I think the worst that happens is that we don't revisit the node a second time to look for additional combines. We used UpdateNodeOperands so the updating the DAG work was already done.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321148 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed