m68k: 68000 port for megadrive

[Daniel Palmer]

Hello m68k people,

I'm not going to send patches* for this but I thought it'd at least be
funny to someone.
I've used my DeviceTree enabled version of the 68000 code to do a
quick port to the megadrive.

https://github.com/LinuxMD/linuxmd (screenshot is near the end)

Cheers,

Daniel

* Although I'm working on pushing the nolibc bits so it can produce
nommu friendly ELFs.