[X86][Atom] Fix vector fadd/fcmp/fmul resource/throughputs

Match whats documented in the Intel AOM - these are all fadd/fcmp use Port1 and fmul uses Port1, but in many cases BOTH ports are required - this was being incorrectly modelled as EITHER port.

Discovered while investigating the correct fptoui costs to fix the regressions in D101555.

Now that we can use in-order models in llvm-mca, the atom model is a good "worst case scenario" analysis for x86.