[ARM] Remove t2xtpk feature from tests

I previously removed the T2XtPk feature from the ARM backend, but it
looks like I missed some of the tests that were using the feature.

Differential Revision: https://reviews.llvm.org/D30778



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297386 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed