Adapted everything to integrate with current 5.99 source.
Added an Amiga PIC for interrupt handling.
Status:
A CSPPC machine probably boots into single user, but only few devices
will attach without problems (e.g. keyboard, serial, parallel, floppy disk,
the RTC, CC graphics, sometimes Ariande ethernet and A4000 IDE.
BPPC support is prepared, but unfinished and untested (I don't own a BPPC).
A problem which has to be solved is interrupt acknowledging, which may happen
twice. Once in the amiga drivers from sys/arch/amiga/dev and then in the PPC
specific pic_amiga.c.