refactor(tc): move the FVP RoS to a separate file

In trying to use the same DTS for the FVP and FPGA subvariants we need
to keep track of what is different. Move the FVP RoS, which is different
to the FPGA's, to reduce the number of ifdefs and make FVP-only changes
easier.

Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: Ib7999d3e39de55ab4a30e68dd81f95120be15a8c
2 files changed