Use the full form of dccci and iccci from the early PPC 405 documents,
since the operands are actually used on those cores. Provide aliases for
the only documented case in the newer Power ISA speec.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215282 91177308-0d34-0410-b5e6-96231b3b80d8