[CodeGen] Move printing MO_CFIIndex operands to MachineOperand::print

Work towards the unification of MIR and debug output by refactoring the
interfaces.

Before this patch we printed "<call frame instruction>" in the debug
output.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321084 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed