Revert r321897: affected testcases were not updated

Commit message:
[Hexagon] Even simpler patterns for sign- and zero-extending HVX vectors


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321902 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed