DRAFT: #425: Adding CM5, but boardcodes are still missing...

[FDelporte]

Closes #425

But board codes are still missing...

[FDelporte]

Confirmed by @geerlingguy:

pi@cm5:~ $ cat /proc/cpuinfo | grep 'Revision' | awk '{print $3}'
c04180
That one is I think 4GB RAM mode

[FDelporte]

Thanks for the approval @dariuszzbyrad, I just changed one more thing: converted code comment to remark in the enum so it will be visualized on api.pi4j.com