Add files from blackmagic project

Signed-off-by: George McCollister <george.mccollister@gmail.com>
Reset USB so new endpoints are detected by host
remove LEDs
Added rx_pin configuration
Added 2 more ACMs for a total of 4

Last two seem to have a problem
Use 32 byte bulk endpoint size

Use 32 byte bulk endpoint size since there isn't enough packet buffer SRAM
for 64 on 4 ports.