This corrects creation of operands for t2PLDW. It also removes the definition of t2PLDWpci,
as pldw does not have a literal variant (i.e. pc relative version)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187804 91177308-0d34-0410-b5e6-96231b3b80d8