Modify Port constants file for necessary buttons during stage iterations

[smit-happens]

Due to the lack of SMD pads on the current Teensy, the port file needs to be modified for the time being when we have to get buttons working for the basic operation of the car until new SMD headers come in.

Suggestion:

• Mark the temporary port changes with a FIXME: comment on the same line so they show up when viewing the file
• make an issue titled fix port file

[smit-happens]

@PatHock ordered the replacement SMD headers so this is just going to stay the way it is