platform: arm/mps2/fvp_sse300 deprecation

The final step in the platform deprecation according to the process:
platform/ext/platform_deprecation.rst

Signed-off-by: Anton Komlev <anton.komlev@arm.com>
Change-Id: I5ceed91e4161f236e0dcd82b5c23443f00d97004
51 files changed