[XCore] Add TSETR instruction.

This instruction is not targeted by the compiler but it is needed for the
MC layer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175406 91177308-0d34-0410-b5e6-96231b3b80d8
[XCore] Add missing 2r instructions.

These instructions are not targeted by the compiler but it is needed for
the MC layer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175407 91177308-0d34-0410-b5e6-96231b3b80d8