Temporarily Revert "[PowerPC] Generate Power9 extswsli extend sign and shift immediate instruction" due to it causing a compiler crash on valid.

This reverts commit r340016, testcase forthcoming.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@340315 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed