New powerpc big-endian ISO split

[kth5]

Previously the powerpc ISO would include both 32bit and 64bit kernels to re-use the same ISO download/CD-R for both scenarios, such as running a 32bit userland on a PowerMac G5.

This has had the negative side effect to not let the ISO fit on a CD-R anymore (>800Mbyte).

With the kernels being a major impact on ISO sizes, it was a natural decision to split the ISOs up into two.

ISO	Description
https://archlinuxpower.org/iso/archpower-current-powerpc.iso	32bit big-endian powerpc
https://archlinuxpower.org/iso/archpower-current-powerpc6432.iso	32bit big-endian powerpc userland with 64bit powerpc64 kernel
https://archlinuxpower.org/iso/archpower-current-powerpc64.iso	64bit big-endian powerpc userland with 64bit powerpc64 kernel

Please be aware of this since you must use a kernel matching your system as a 64bit kernel won't run in 32bit machines and vice versa. If you need address space for processes asking for more than 4GiB RAM, chose a pure powerpc64 installer. If you are out for speed and efficiency, run powerpc6432 on a 64bit system.

[Oichkatzelesfrettschen]

Good call! Thanks for keeping this CD-sized!