Assignment of I2C, GPIOs and MMC interfaces and B2B connector

Hi, here is a table with a lot of material which should go to the Wiki.

I think I have already uploaded the MMC table, but the others are missing and need to be taken care of.

Maybe someone has time to reformat that to HTML. Ideally it is also reviewed to match the schematics because I am not sure that I did track all late changes (but it should be ~99%) for V5.1 hardware.

(V1 and V2 were studies for mechanical design, V3 and V4 are the EVM based prototypes, V5.0 the first ~7 prototypes and V5.1 is the mass production version)

BR and thanks, Nikolaus