arm64: dts: apple: Add CPU topology & cpufreq nodes for t8103

Add the missing CPU topology/capacity information and the cpufreq nodes,
so we can have CPU frequency scaling and the scheduler has the
information it needs to make the correct decisions.

Boost states are commented out, as they are not yet available (that
requires CPU deep sleep support, to be eventually done via PSCI).
The driver supports them fine; the hardware will just refuse to ever
go into them at this time, so don't expose them to users until that's
done.

Acked-by: Marc Zyngier <maz@kernel.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Hector Martin <marcan@marcan.st>