PowerPC is now unstable/sid - requested for deb-multimedia a…

Hello!

I use deb-multimedia on all of my Debian boxes. I now have reactivated
an older Power Mac G4 and maybe I'm going to revive a G5 as well.

Since PowerPC is no longer either stable or testing, I would ask for
powerpc to be added to unstable aka sid also in deb-multimedia.

Thanks,
Linux User #330250