The device tree bindings for aplcpu(4) changed once more, recycling the

The device tree bindings for aplcpu(4) changed once more, recycling the
"apple,cluster-cpufreq" compatible that was used for the first version.
Add support for the "new new" binding while retaining support for the
"old new" binding.  Hopefully nobody is using the "old" binding anymore
now that we update the m1n1+u-boot+dtb "boot firmware" automatically on
sysupgrade.

ok patrick@, tobhe@