Porting "prep" from ppc to powerpc.

[Rob Landley]

Is anyone already doing this?  I asked around here a few weeks ago and got the 
advice:

> In theory.. copy the files from ppc/platforms/prep.* to
> powerpc/platforms/prep/ 
> and make some Kconfigs and see what breaks :)

Unfortunately, there isn't a ppc/platforms/prep.  Under arch/ppc there's:

./boot/simple/misc-prep.c
./boot/simple/prepmap.c
./boot/utils/mkprep.c
./configs/prep_defconfig
./platforms/prep_pci.c
./platforms/prep_setup.c
./syslib/prep_nvram.c

And I'm not sure which are relevant.  Any hints?

Rob