5bbed31513
solvers usually output fbdiv directly, using vco_freq to get back to fbdiv is not all that necessary or useful. both vco_freq and fbdiv have hidden constraints, but vco_freq is a lot less accurate because the fbdiv value resulting from the division may be off by almost a full ref_freq's worth of frequency. also fixes the usb pll config, which ran the pll vco way out of (below) spec.