FVP: Add support for passing platform's topology to DTS ...

This patch adds support for passing FVP platform's topology
configuration to DTS files for compilation, which allows to
build DTBs with correct number of clusters and CPUs.
This removes non-existing clusters/CPUs from the compiled
device tree blob and fixes reported Linux errors when trying
to power on absent CPUs/PEs.
If DTS file is passed using FVP_HW_CONFIG_DTS build option from
the platform's makefile, FVP_CLUSTER_COUNT, FVP_MAX_CPUS_PER_CLUSTER
and FVP_MAX_PE_PER_CPU parameters are used, otherwise CI script will
use the default values from the corresponding DTS file.

Change-Id: Idcb45dc6ad5e3eaea18573aff1a01c9344404ab3
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>

Replace dts includes with C preprocessor syntax ...

Using the /include/ syntax, the include was evaluated by dtc, only after running
the preprocessor, therefore the .dtsi files were not preprocessed. This patch
adds the #include syntax instead. Evaluating this and preprocessing the files
now happens in a single step, done by the C preprocessor.

Change-Id: I6d0104b6274316fc736e84973502a4d6c2c9d6e0
Signed-off-by: Balint Dobszay <balint.dobszay@arm.com>

Add Linux DTS files for 32 bit threaded FVPs ...

RevC models have the MT bit set and the affinities shifted in the MPIDR
register. To make the Linux able to boot all CPUs it needs a modified
DTS file containing the shifted affinity values.

Beside these values the DTS files should be the same so the common part
was moved into a new file which is included in the DTS files with
shifted and non-shifted affinities.

The same setup already exists for 64 bit systems.

Signed-off-by: Imre Kis <imre.kis@arm.com>
Change-Id: I90f7b9c8d8a24c9b3f97232441dbe0a29aa8976d