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

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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321110 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed