[mips][sched] Split IILogic into II_AND, II_OR, II_XOR, II_ANDI, II_ORI, II_XORI

This is necessary because the classes are shared between all implementations.

No functional change since the InstrItinData's have been duplicated.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199394 91177308-0d34-0410-b5e6-96231b3b80d8