Add Upduino board support

[m00dawg]

This is my first pass and to be clear I'm not sure I know what I'm doing :P But I got an Upduino to do FPGA things, among them is to play with a FemtoRV core. Upduino seems similar to Icebreaker based on some threads in Discussions so thought I'd take a crack at seeing if I can at least make things compile. Still waiting for the hardware arrive to properly test.