More comments and LTSSM bugfixes and more debug options
- Further commenting was done to improve code readability
- A few bugs were found in the LTSSM polling states
- Further comparison with PCIe specification pending in the next few days
- LTSSM state machine debugging was fancified
- Real time from the 100 MHz oscillator was added, to see if the RX clock domain gitches
- Link and Lane numbers from the PHY were added
- Another debugging option for recording symbols received in a specific state was added