Platform/ARM: Juno: Add support for PPTT dynamic generation

Update the Platform Respository for the Juno platform
to include support for generation of the Processor Properties
Topology Table (PPTT) using the Dynamic Tables Framework.

The Platform Repository now also describes the cache and
processor topology in Juno (all revisions).

Signed-off-by: Krzysztof Koch <krzysztof.koch@arm.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>